Siyuan Note
Monthly
Missing authorization on SiYuan's /api/ref/refreshBacklink endpoint exposes instances prior to v3.7.4 to unauthenticated server-side write operations. Any network-accessible anonymous user can supply an attacker-controlled block ID to flush transaction queues, trigger global reference scans, and enqueue database writes, bypassing the application's read-only access controls. No public exploit code or active exploitation (CISA KEV) has been identified at time of analysis, but the unauthenticated network vector and low attack complexity make this a viable target for resource amplification abuse.
The getLocalStorage API endpoint in SiYuan before v3.7.4 exposes the administrator's full local storage map to unauthenticated network callers and publish readers, with only three keys redacted by an incomplete sanitization filter. Sensitive operational metadata - including closed-tab history, search keywords, private document identifiers, and expanded folder paths - can be harvested in a single unauthenticated HTTP request against any network-accessible instance. No public exploit has been identified at time of analysis, but the zero-authentication, low-complexity attack path means any internet-exposed SiYuan deployment running a version below 3.7.4 is trivially reachable.
The getBookmarkLabels API endpoint in SiYuan before v3.7.4 exposes all workspace bookmark labels to unauthenticated and publish-mode readers due to missing authorization checks (CWE-862), leaking organizational metadata - topic taxonomy, project labels, and subject-matter vocabulary - from documents the requester cannot otherwise access. Any network-reachable SiYuan instance prior to v3.7.4 is affected regardless of publish-mode configuration, as the endpoint applies no access-control filtering. No public exploit has been identified at time of analysis, and no CISA KEV listing exists; risk is primarily reconnaissance-enabling intelligence disclosure rather than direct data exfiltration.
Unauthorized document outline disclosure in SiYuan before v3.7.4 exposes heading identifiers for any document to unauthenticated network callers via the `/api/storage/getOutlineStorage` endpoint, which performs no authorization verification whatsoever. Affected are all SiYuan deployments (cpe:2.3:a:siyuan-note:siyuan:*) configured to listen on externally reachable interfaces running any version prior to v3.7.4. No public exploit has been identified at time of analysis, though the attack requires no credentials and is trivially automatable - any caller who supplies a document identifier retrieves its structural outline regardless of document-level access restrictions.
Unauthenticated access to the /api/block/getRefIDs endpoint in SiYuan before v3.7.4 exposes block reference metadata from password-protected documents, allowing remote attackers without any credentials to enumerate internal document structures. The endpoint fails to enforce the document-level password tier before returning block identifiers, meaning the password protection on sensitive documents is effectively bypassed for this API route. No public exploit code has been identified at time of analysis, and a vendor-released patch is available in v3.7.4 per the GitHub Security Advisory GHSA-vg99-7gj7-2fr5.
Unauthenticated filesystem reconnaissance in SiYuan versions before v3.7.4 allows any network-reachable anonymous reader to probe arbitrary absolute paths on the host via the `getUniqueFilename` endpoint, which performs no authorization check or path confinement before returning existence results. The missing authorization control (CWE-862) means the attack requires zero credentials and zero user interaction against any exposed SiYuan HTTP interface, enabling structured enumeration of filesystem layout, installed software, and sensitive path locations as a precursor to more targeted attacks. No public exploit code and no CISA KEV listing have been identified at time of analysis, but the zero-barrier exploitation profile makes pre-attack reconnaissance trivially achievable against internet-exposed or LAN-accessible instances.
PDF annotation content in SiYuan through v3.7.2 is exposed without authorization via the /api/asset/getFileAnnotation endpoint, which applies only the generic CheckAuth middleware rather than the publish-access controls enforced on the /assets/* route. When publish authentication is disabled, anonymous readers can retrieve .sya annotation files containing private highlights and notes from password-protected, unpublished, or publish-forbidden documents simply by knowing a valid asset path; authenticated publish RoleReaders face the same missing check. The CVSS 4.0 score of 6.9 reflects a network-accessible, unauthenticated vector with limited scope - encrypted notebooks are not affected - and no public exploit code or CISA KEV listing has been identified at time of analysis.
Authentication bypass in SiYuan's publish layer exposes password-protected attribute view data to unauthenticated remote users across all versions before v3.7.4. The FilterViewByPublishAccess filter omits its password enforcement on the renderAttributeView code path, allowing arbitrary callers to retrieve structured database rows - including document titles, block IDs, and column values - from documents the owner intended to gate with a publish password. No active exploitation is confirmed (not in CISA KEV) and no public exploit code has been identified at time of analysis; vendor patch is available at v3.7.4.
Unauthorized information disclosure in SiYuan exposes protected document metadata and content snippets via three unenforced API endpoints - getBlockBreadcrumb, getRefText, and getBlockTreeInfos - in all versions before v3.7.4. Unauthenticated network actors or low-privilege RoleReader accounts can bypass publish-access controls on documents explicitly marked as publish-forbidden or password-protected, retrieving titles, ancestor block content snippets, reference text, and path metadata by supplying block IDs. No public exploit has been identified at time of analysis; vendor patch is available in v3.7.4.
Unauthenticated information disclosure in SiYuan versions before 3.7.4 allows retrieval of block attributes - names, aliases, memos, and custom fields - from documents protected by publish-access controls. The `getBlockAttrs` and `batchGetBlockAttrs` API endpoints accept POST requests with block IDs without verifying the caller's authorization against the parent document's access policy, directly bypassing the publish-access restriction (CWE-862). No active exploitation has been confirmed and no public proof-of-concept has been identified; impact is bounded to metadata exposure rather than full document content, but the unauthenticated network vector warrants prompt patching for internet-exposed instances.
Information disclosure in SiYuan before v3.7.4 allows unauthenticated remote attackers to retrieve the server's absolute filesystem workspace path, operating-system username, and installation layout by querying the resolveAssetPath endpoint with relative asset paths harvested from published documents. The endpoint enforces only a lightweight CheckAuth gate rather than full authentication, satisfying CWE-639's authorization bypass pattern, and returns raw absolute paths to any network-reachable caller. Vendor patch v3.7.4 has been released; no active exploitation has been confirmed and no public proof-of-concept code has been identified at time of analysis.
Missing authorization controls on three internal API endpoints in SiYuan before v3.7.4 allow callers operating within the publish context to retrieve database column schemas, template expressions, select vocabularies, and workspace-wide block identifiers that were never intended to cross publish access boundaries. The affected endpoints - getAttributeViewKeysByID, getBlockDefIDsByRefText, and getBlockRelevantIDs - perform their operations without consulting publish-scoped permission checks, constituting a CWE-862 (Missing Authorization) flaw. A vendor patch is available at v3.7.4, no public exploit code has been identified at time of analysis, and the vulnerability is not listed in CISA KEV.
Five path-resolution API endpoints in SiYuan's publish mode fail to enforce access controls, allowing unauthenticated or minimally-authenticated readers to enumerate the complete private document tree. Affected versions are all SiYuan releases up to and including v3.7.2; v3.7.4 contains the fix. An attacker targeting a SiYuan instance running in publish mode with Publish.Auth.Enable set to false can call getFullHPathByID, getHPathByID, getPathByID, getIDsByHPath, and getHPathByPath without any credentials to recover notebook names, folder hierarchies, document titles, and document IDs - including for content explicitly marked hidden, password-protected, or publish-forbidden. No public exploit code and no CISA KEV listing have been identified at time of analysis.
Unauthenticated information disclosure in SiYuan before v3.7.4 exposes encrypted notebook identifiers, names, and memory-resident unlock states via the getEncryptedNotebookStatus API endpoint without enforcing publish-access filtering. Any anonymous or publish-mode client that can reach the instance can enumerate the full list of encrypted notebooks and determine which are actively decrypted in server memory, leaking sensitive organizational metadata. No public exploit has been identified and no CISA KEV listing exists; a vendor-released patch is available in v3.7.4.
Static-route access control bypass in SiYuan before v3.7.4 allows attackers to read sensitive workspace data by directly accessing file-serving routes that skip the authorization checks enforced on the REST API. Affected deployments include any SiYuan instance operating in disabled-auth mode (anonymous access) or where publish reader tokens have been issued, as those token holders can reach templates, snippets, and export artifacts without restriction. No public exploit or active exploitation has been identified at time of analysis, but the patch to v3.7.4 is available and should be applied promptly given the unauthenticated attack vector in disabled-auth configurations.
SiYuan's /api/tag/getTag endpoint leaks tag labels and occurrence counts from password-protected documents to any unauthenticated network caller, constituting an authorization bypass under CWE-863. All SiYuan versions before 3.7.4 are affected, as confirmed by a vendor GitHub Security Advisory (GHSA-mp7r-57w4-5qm3) and the EUVD entry EUVD-2026-57452. No public exploit code has been identified and the vulnerability is not listed in the CISA KEV catalog; however, the zero-friction network exploitability (PR:N, AC:L, UI:N) means any attacker with network reach can enumerate protected document vocabulary with a single API call.
Information disclosure in SiYuan v3.7.4-alpha.1 (pre-release only) permits any caller who passes basic authentication to retrieve complete database view metadata - including view names, icons, layout types, and per-field Hidden flags - for arbitrary database blocks by supplying an avID, regardless of their access level. The `/api/av/getAttributeViewFieldViews` endpoint introduced in commit acfc02ee8 applies `CheckAuth` middleware but omits any ownership or publish-access filter, producing a CWE-862 Missing Authorization condition. The vulnerability was corrected in the v3.7.4 stable release; no public exploit or active exploitation has been identified at time of analysis.
Unauthenticated information disclosure in SiYuan before v3.7.4 exposes notebook metadata - including names, document counts, storage sizes, and timestamps - for closed and non-published notebooks via the /api/notebook/getNotebookInfo endpoint, which performs no authorization check. Any attacker with network access to the SiYuan API can enumerate structural information that the application's access control model explicitly intends to hide from readers. No public exploit or CISA KEV listing has been identified at time of analysis, but the zero-friction, unauthenticated attack path makes this trivially exploitable wherever the API is internet- or network-exposed.
Information disclosure in SiYuan before v3.7.4 exposes administrator workspace state to unauthenticated network attackers via an improperly protected getConf API endpoint. The UILayout filter fails to enforce authorization boundaries between publish readers and the administrative configuration layer, leaking open document names, recent search terms, notebook directory paths, and private asset locations. No public exploit code or CISA KEV listing exists at time of analysis; however, the unauthenticated network vector makes the flaw trivially reachable on any internet-exposed SiYuan instance with publish features active.
Metadata disclosure in SiYuan before v3.7.3 exposes document titles, notebook paths, root IDs, and icons for administrator-restricted documents via the unauthenticated `/api/block/getBlockInfo` endpoint. The publish-access control flag is never checked server-side before returning document root metadata, making this a complete bypass of SiYuan's per-document publish exclusion feature. No public exploit is identified at time of analysis and no KEV listing exists, but the CVSS 4.0 vector (PR:N, AC:L) confirms exploitation requires no credentials and no special conditions against the network-facing API.
Credential file exfiltration in SiYuan prior to 3.7.1 is possible through the POST /api/file/globalCopyFiles endpoint, which accepts arbitrary absolute source paths and relies on an incomplete denylist in util.IsSensitivePath to block sensitive files. The denylist omits common credential files including .git-credentials, .netrc, .pgpass, .kube/config, .docker/config.json, and .gnupg, enabling an authenticated administrator or API-token holder to copy these files into the workspace and read them via the file API. No public exploit code or CISA KEV listing exists at time of analysis, but the Docker tag suggests this is relevant in containerized deployments where host-mounted credential files may be accessible.
Missing authorization on the `/api/storage/getCriteria` endpoint in SiYuan personal knowledge management software exposes saved search criteria - including private document paths, notebook and block IDs, and search/replace keyword history - to any publish-mode Reader, bypassing the access controls applied by all sibling storage endpoints. All SiYuan releases prior to 3.7.1 are affected per the vendor security advisory GHSA-px3c-cf92-9g83. No public exploit has been identified at time of analysis and the vulnerability is not listed in CISA KEV, though the low attack complexity and readily available fix commit make this straightforward to weaponize against exposed instances.
SiYuan's personal knowledge management system prior to 3.7.0 exposes all user note content to unauthenticated database exfiltration through a deliberately auth-excluded API endpoint. The `/api/icon/getDynamicIcon` endpoint, when invoked with `type=8` and a valid block ID, renders a Go template that executes arbitrary SELECT queries against SiYuan's SQLite backend via `querySQL` and `queryBlocks` functions - functions designed for note querying but reachable without any credential check. An attacker with network adjacency who possesses a valid block ID can read the entire database: note content, tags, asset references, and block attributes. No public exploit or CISA KEV listing has been identified at time of analysis; the AC:H rating reflects the block ID prerequisite. A fix is available in version 3.7.0.
SiYuan 3.6.1 through 3.6.3 allows arbitrary code execution when users view malicious bazaar packages in the marketplace UI. The vulnerability stems from an incomplete XSS fix (for CVE-2026-33066) that enabled an HTML sanitizer but failed to block iframe tags with srcdoc attributes containing embedded scripts. A malicious package author can inject JavaScript that executes in the Electron process with full application privileges, compromising the user's machine. The issue is confirmed fixed in version 3.6.4 and no public exploitation has been reported at time of analysis.
Missing authorization on SiYuan's /api/ref/refreshBacklink endpoint exposes instances prior to v3.7.4 to unauthenticated server-side write operations. Any network-accessible anonymous user can supply an attacker-controlled block ID to flush transaction queues, trigger global reference scans, and enqueue database writes, bypassing the application's read-only access controls. No public exploit code or active exploitation (CISA KEV) has been identified at time of analysis, but the unauthenticated network vector and low attack complexity make this a viable target for resource amplification abuse.
The getLocalStorage API endpoint in SiYuan before v3.7.4 exposes the administrator's full local storage map to unauthenticated network callers and publish readers, with only three keys redacted by an incomplete sanitization filter. Sensitive operational metadata - including closed-tab history, search keywords, private document identifiers, and expanded folder paths - can be harvested in a single unauthenticated HTTP request against any network-accessible instance. No public exploit has been identified at time of analysis, but the zero-authentication, low-complexity attack path means any internet-exposed SiYuan deployment running a version below 3.7.4 is trivially reachable.
The getBookmarkLabels API endpoint in SiYuan before v3.7.4 exposes all workspace bookmark labels to unauthenticated and publish-mode readers due to missing authorization checks (CWE-862), leaking organizational metadata - topic taxonomy, project labels, and subject-matter vocabulary - from documents the requester cannot otherwise access. Any network-reachable SiYuan instance prior to v3.7.4 is affected regardless of publish-mode configuration, as the endpoint applies no access-control filtering. No public exploit has been identified at time of analysis, and no CISA KEV listing exists; risk is primarily reconnaissance-enabling intelligence disclosure rather than direct data exfiltration.
Unauthorized document outline disclosure in SiYuan before v3.7.4 exposes heading identifiers for any document to unauthenticated network callers via the `/api/storage/getOutlineStorage` endpoint, which performs no authorization verification whatsoever. Affected are all SiYuan deployments (cpe:2.3:a:siyuan-note:siyuan:*) configured to listen on externally reachable interfaces running any version prior to v3.7.4. No public exploit has been identified at time of analysis, though the attack requires no credentials and is trivially automatable - any caller who supplies a document identifier retrieves its structural outline regardless of document-level access restrictions.
Unauthenticated access to the /api/block/getRefIDs endpoint in SiYuan before v3.7.4 exposes block reference metadata from password-protected documents, allowing remote attackers without any credentials to enumerate internal document structures. The endpoint fails to enforce the document-level password tier before returning block identifiers, meaning the password protection on sensitive documents is effectively bypassed for this API route. No public exploit code has been identified at time of analysis, and a vendor-released patch is available in v3.7.4 per the GitHub Security Advisory GHSA-vg99-7gj7-2fr5.
Unauthenticated filesystem reconnaissance in SiYuan versions before v3.7.4 allows any network-reachable anonymous reader to probe arbitrary absolute paths on the host via the `getUniqueFilename` endpoint, which performs no authorization check or path confinement before returning existence results. The missing authorization control (CWE-862) means the attack requires zero credentials and zero user interaction against any exposed SiYuan HTTP interface, enabling structured enumeration of filesystem layout, installed software, and sensitive path locations as a precursor to more targeted attacks. No public exploit code and no CISA KEV listing have been identified at time of analysis, but the zero-barrier exploitation profile makes pre-attack reconnaissance trivially achievable against internet-exposed or LAN-accessible instances.
PDF annotation content in SiYuan through v3.7.2 is exposed without authorization via the /api/asset/getFileAnnotation endpoint, which applies only the generic CheckAuth middleware rather than the publish-access controls enforced on the /assets/* route. When publish authentication is disabled, anonymous readers can retrieve .sya annotation files containing private highlights and notes from password-protected, unpublished, or publish-forbidden documents simply by knowing a valid asset path; authenticated publish RoleReaders face the same missing check. The CVSS 4.0 score of 6.9 reflects a network-accessible, unauthenticated vector with limited scope - encrypted notebooks are not affected - and no public exploit code or CISA KEV listing has been identified at time of analysis.
Authentication bypass in SiYuan's publish layer exposes password-protected attribute view data to unauthenticated remote users across all versions before v3.7.4. The FilterViewByPublishAccess filter omits its password enforcement on the renderAttributeView code path, allowing arbitrary callers to retrieve structured database rows - including document titles, block IDs, and column values - from documents the owner intended to gate with a publish password. No active exploitation is confirmed (not in CISA KEV) and no public exploit code has been identified at time of analysis; vendor patch is available at v3.7.4.
Unauthorized information disclosure in SiYuan exposes protected document metadata and content snippets via three unenforced API endpoints - getBlockBreadcrumb, getRefText, and getBlockTreeInfos - in all versions before v3.7.4. Unauthenticated network actors or low-privilege RoleReader accounts can bypass publish-access controls on documents explicitly marked as publish-forbidden or password-protected, retrieving titles, ancestor block content snippets, reference text, and path metadata by supplying block IDs. No public exploit has been identified at time of analysis; vendor patch is available in v3.7.4.
Unauthenticated information disclosure in SiYuan versions before 3.7.4 allows retrieval of block attributes - names, aliases, memos, and custom fields - from documents protected by publish-access controls. The `getBlockAttrs` and `batchGetBlockAttrs` API endpoints accept POST requests with block IDs without verifying the caller's authorization against the parent document's access policy, directly bypassing the publish-access restriction (CWE-862). No active exploitation has been confirmed and no public proof-of-concept has been identified; impact is bounded to metadata exposure rather than full document content, but the unauthenticated network vector warrants prompt patching for internet-exposed instances.
Information disclosure in SiYuan before v3.7.4 allows unauthenticated remote attackers to retrieve the server's absolute filesystem workspace path, operating-system username, and installation layout by querying the resolveAssetPath endpoint with relative asset paths harvested from published documents. The endpoint enforces only a lightweight CheckAuth gate rather than full authentication, satisfying CWE-639's authorization bypass pattern, and returns raw absolute paths to any network-reachable caller. Vendor patch v3.7.4 has been released; no active exploitation has been confirmed and no public proof-of-concept code has been identified at time of analysis.
Missing authorization controls on three internal API endpoints in SiYuan before v3.7.4 allow callers operating within the publish context to retrieve database column schemas, template expressions, select vocabularies, and workspace-wide block identifiers that were never intended to cross publish access boundaries. The affected endpoints - getAttributeViewKeysByID, getBlockDefIDsByRefText, and getBlockRelevantIDs - perform their operations without consulting publish-scoped permission checks, constituting a CWE-862 (Missing Authorization) flaw. A vendor patch is available at v3.7.4, no public exploit code has been identified at time of analysis, and the vulnerability is not listed in CISA KEV.
Five path-resolution API endpoints in SiYuan's publish mode fail to enforce access controls, allowing unauthenticated or minimally-authenticated readers to enumerate the complete private document tree. Affected versions are all SiYuan releases up to and including v3.7.2; v3.7.4 contains the fix. An attacker targeting a SiYuan instance running in publish mode with Publish.Auth.Enable set to false can call getFullHPathByID, getHPathByID, getPathByID, getIDsByHPath, and getHPathByPath without any credentials to recover notebook names, folder hierarchies, document titles, and document IDs - including for content explicitly marked hidden, password-protected, or publish-forbidden. No public exploit code and no CISA KEV listing have been identified at time of analysis.
Unauthenticated information disclosure in SiYuan before v3.7.4 exposes encrypted notebook identifiers, names, and memory-resident unlock states via the getEncryptedNotebookStatus API endpoint without enforcing publish-access filtering. Any anonymous or publish-mode client that can reach the instance can enumerate the full list of encrypted notebooks and determine which are actively decrypted in server memory, leaking sensitive organizational metadata. No public exploit has been identified and no CISA KEV listing exists; a vendor-released patch is available in v3.7.4.
Static-route access control bypass in SiYuan before v3.7.4 allows attackers to read sensitive workspace data by directly accessing file-serving routes that skip the authorization checks enforced on the REST API. Affected deployments include any SiYuan instance operating in disabled-auth mode (anonymous access) or where publish reader tokens have been issued, as those token holders can reach templates, snippets, and export artifacts without restriction. No public exploit or active exploitation has been identified at time of analysis, but the patch to v3.7.4 is available and should be applied promptly given the unauthenticated attack vector in disabled-auth configurations.
SiYuan's /api/tag/getTag endpoint leaks tag labels and occurrence counts from password-protected documents to any unauthenticated network caller, constituting an authorization bypass under CWE-863. All SiYuan versions before 3.7.4 are affected, as confirmed by a vendor GitHub Security Advisory (GHSA-mp7r-57w4-5qm3) and the EUVD entry EUVD-2026-57452. No public exploit code has been identified and the vulnerability is not listed in the CISA KEV catalog; however, the zero-friction network exploitability (PR:N, AC:L, UI:N) means any attacker with network reach can enumerate protected document vocabulary with a single API call.
Information disclosure in SiYuan v3.7.4-alpha.1 (pre-release only) permits any caller who passes basic authentication to retrieve complete database view metadata - including view names, icons, layout types, and per-field Hidden flags - for arbitrary database blocks by supplying an avID, regardless of their access level. The `/api/av/getAttributeViewFieldViews` endpoint introduced in commit acfc02ee8 applies `CheckAuth` middleware but omits any ownership or publish-access filter, producing a CWE-862 Missing Authorization condition. The vulnerability was corrected in the v3.7.4 stable release; no public exploit or active exploitation has been identified at time of analysis.
Unauthenticated information disclosure in SiYuan before v3.7.4 exposes notebook metadata - including names, document counts, storage sizes, and timestamps - for closed and non-published notebooks via the /api/notebook/getNotebookInfo endpoint, which performs no authorization check. Any attacker with network access to the SiYuan API can enumerate structural information that the application's access control model explicitly intends to hide from readers. No public exploit or CISA KEV listing has been identified at time of analysis, but the zero-friction, unauthenticated attack path makes this trivially exploitable wherever the API is internet- or network-exposed.
Information disclosure in SiYuan before v3.7.4 exposes administrator workspace state to unauthenticated network attackers via an improperly protected getConf API endpoint. The UILayout filter fails to enforce authorization boundaries between publish readers and the administrative configuration layer, leaking open document names, recent search terms, notebook directory paths, and private asset locations. No public exploit code or CISA KEV listing exists at time of analysis; however, the unauthenticated network vector makes the flaw trivially reachable on any internet-exposed SiYuan instance with publish features active.
Metadata disclosure in SiYuan before v3.7.3 exposes document titles, notebook paths, root IDs, and icons for administrator-restricted documents via the unauthenticated `/api/block/getBlockInfo` endpoint. The publish-access control flag is never checked server-side before returning document root metadata, making this a complete bypass of SiYuan's per-document publish exclusion feature. No public exploit is identified at time of analysis and no KEV listing exists, but the CVSS 4.0 vector (PR:N, AC:L) confirms exploitation requires no credentials and no special conditions against the network-facing API.
Credential file exfiltration in SiYuan prior to 3.7.1 is possible through the POST /api/file/globalCopyFiles endpoint, which accepts arbitrary absolute source paths and relies on an incomplete denylist in util.IsSensitivePath to block sensitive files. The denylist omits common credential files including .git-credentials, .netrc, .pgpass, .kube/config, .docker/config.json, and .gnupg, enabling an authenticated administrator or API-token holder to copy these files into the workspace and read them via the file API. No public exploit code or CISA KEV listing exists at time of analysis, but the Docker tag suggests this is relevant in containerized deployments where host-mounted credential files may be accessible.
Missing authorization on the `/api/storage/getCriteria` endpoint in SiYuan personal knowledge management software exposes saved search criteria - including private document paths, notebook and block IDs, and search/replace keyword history - to any publish-mode Reader, bypassing the access controls applied by all sibling storage endpoints. All SiYuan releases prior to 3.7.1 are affected per the vendor security advisory GHSA-px3c-cf92-9g83. No public exploit has been identified at time of analysis and the vulnerability is not listed in CISA KEV, though the low attack complexity and readily available fix commit make this straightforward to weaponize against exposed instances.
SiYuan's personal knowledge management system prior to 3.7.0 exposes all user note content to unauthenticated database exfiltration through a deliberately auth-excluded API endpoint. The `/api/icon/getDynamicIcon` endpoint, when invoked with `type=8` and a valid block ID, renders a Go template that executes arbitrary SELECT queries against SiYuan's SQLite backend via `querySQL` and `queryBlocks` functions - functions designed for note querying but reachable without any credential check. An attacker with network adjacency who possesses a valid block ID can read the entire database: note content, tags, asset references, and block attributes. No public exploit or CISA KEV listing has been identified at time of analysis; the AC:H rating reflects the block ID prerequisite. A fix is available in version 3.7.0.
SiYuan 3.6.1 through 3.6.3 allows arbitrary code execution when users view malicious bazaar packages in the marketplace UI. The vulnerability stems from an incomplete XSS fix (for CVE-2026-33066) that enabled an HTML sanitizer but failed to block iframe tags with srcdoc attributes containing embedded scripts. A malicious package author can inject JavaScript that executes in the Electron process with full application privileges, compromising the user's machine. The issue is confirmed fixed in version 3.6.4 and no public exploitation has been reported at time of analysis.