Siyuan
CVE-2026-32815
HIGH
GHSA-xp2m-98x8-rpj6
Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata – not a confirmed exploit chain
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AccessOpen malicious website
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DeliveryBrowser establishes cross-origin WebSocket to /ws endpoint
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ExploitSend authentication bypass parameters
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ExecutionReceive real-time server push events
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ImpactExtract sensitive document metadata and user operations
Vulnerability Assessment
| Weakness |
CWE
OWASP Top 10:2025
A07:2021 - Identification and Authentication Failures
ASVS 5.0
V2 - Authentication Authentication mechanism strength, credential management
MITRE ATT&CK
2 techniques across 2 tactics: Defense Evasion, Initial Access The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up. |
| Exploitation Conditions | SiYuan 3.6.0 and below with WebSocket endpoint (/ws) accessible. Attacker sends unauthenticated WebSocket connection with URL parameters (?app=siyuan&id=auth&type=auth). No user interaction required; malicious websites can exploit via cross-origin WebSocket. Remote unauthenticated exploitation. |
| Impact | Unauthorized access to protected functionality, data, or administrative interfaces, potentially leading to full system compromise. |
| Exploit ScenarioDerived | An attacker manipulates authentication tokens, exploits logic flaws, or uses default credentials to bypass the login mechanism and access restricted areas. |
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Alert meAnalysisAIv1 – Mar 19, 2026
SiYuan knowledge management system versions 3.6.0 and below allow unauthenticated WebSocket connections to the /ws endpoint via specific URL parameters, enabling attackers to bypass authentication and receive real-time server push events. An attacker can exploit this by connecting from a malicious website to monitor a victim's local SiYuan instance and exfiltrate sensitive metadata including document titles, notebook names, file paths, and user activity without the victim's knowledge. No patch is currently available for this high-severity information disclosure vulnerability.
Earlier versions of this analysis (1)
RemediationAI
Implement robust authentication mechanisms. Use multi-factor authentication. Review authentication logic for bypass conditions. Remove default credentials.
Affected Packages
Source: OSV (Open Source Vulnerabilities)
Affects your stack
Affects 1 package in go
Checking this CVE against your own stacks and servers is part of the Basic plan and up.
Technical ContextAI · show details
An authentication bypass vulnerability allows attackers to circumvent login mechanisms and gain unauthorized access without valid credentials. This vulnerability is classified as Improper Authentication (CWE-287).
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- Exploit and PoC references, threat intelligence from 22 sources
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Severity by source
AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Primary rating from GitHub Advisory.
CVSS VectorGitHub Advisory
DescriptionGitHub Advisory
SiYuan is a personal knowledge management system. In versions 3.6.0 and below, the WebSocket endpoint (/ws) allows unauthenticated connections when specific URL parameters are provided (?app=siyuan&id=auth&type=auth). This bypass, intended for the login page to keep the kernel alive, allows any external client - including malicious websites via cross-origin WebSocket - to connect and receive all server push events in real-time. These events leak sensitive document metadata including document titles, notebook names, file paths, and all CRUD operations performed by authenticated users. Combined with the absence of Origin header validation, a malicious website can silently connect to a victim's local SiYuan instance and monitor their note-taking activity. This issue has been fixed in version 3.6.1.
Executive ViewAI
Organizations using SiYuan face notable risk from CVE-2026-32815, a improper authentication vulnerability rated CVSS 7.5. Attackers could bypass security controls to gain unauthorized access to protected resources and sensitive data. Organizations should apply vendor updates when available and consider compensating controls in the interim.
Apply vendor patch. If immediate patching is not feasible: (1) Implement network-level access controls; (2) Enable MFA where possible; (3) Monitor authentication logs for anomalous access.
Threat Intelligence Overview
NVD
CVE.org
EPSS
VulDB
How this decision was reached
The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.
What every action level means
SSVC AssessmentENISA
Priority Score
Attack Technique
Authentication bypass attacks exploit flaws in the verification mechanisms that control access to systems and applications.
Affected Products (CPE)GitHub Advisory
SQL injection in SiYuan's fullTextSearchAssetContent endpoint lets unauthenticated attackers and holders of publish Role
Stored cross-site scripting in SiYuan personal knowledge management before 3.7.0 lets an attacker with write access to a
SQL injection in SiYuan personal knowledge management (versions <= v3.7.2) lets attackers pass arbitrary SQL statements
Stored cross-site scripting in SiYuan's attribute-view (database) cell renderer, affecting all versions prior to 3.7.0,
SQL injection in SiYuan personal knowledge-management software (all versions before v3.7.3) lets attackers inject arbitr
A SQL injection vulnerability was discovered in Siyuan 3.1.11 in /getHistoryItems. Rated critical severity (CVSS 9.8), t
A SQL injection vulnerability has been identified in Siyuan 3.1.11 via the ids array parameter in /batchGetBlockAttrs. R
A SQL injection vulnerability has been identified in Siyuan 3.1.11 via the id parameter at /getAssetContent. Rated criti
A SQL injection vulnerability has been identified in Siyuan 3.1.11 via the notebook parameter in /searchHistory. Rated c
SiYuan personal knowledge management system prior to 3.5.4 has a stored XSS vulnerability (CVSS 9.6) that allows code ex
Remote code execution in SiYuan note-taking application (before v3.6.1) allows any malicious Bazaar marketplace package
Origin-validation bypass in SiYuan Note (open-source personal knowledge management) before 3.7.0 lets any installed Chro
Same weakness CWE-287 – Improper Authentication
View allSame technique Authentication Bypass
View allVendor StatusVendor
SUSE
Severity: High| Product | Status |
|---|---|
| openSUSE Leap 15.6 | Fixed |
| SUSE Linux Enterprise Module for Package Hub 15 SP5 | Fixed |
| SUSE Linux Enterprise Module for Package Hub 15 SP6 | Fixed |
| openSUSE Leap 15.5 | Fixed |
Exploit-DB