EUVD-2026-74834
GHSA-hfpm-rwr4-jjg8
Severity by source
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Administrator credentials explicitly required per description, so PR:H; impact is read-only SQL access to blocks database, yielding C:H with no integrity or availability impact.
Primary rating from Vendor (VulnCheck).
CVSS VectorVendor: VulnCheck
Lifecycle Timeline
4DescriptionCVE.org
SiYuan versions <= 3.8.1 contain an incomplete fix for CVE-2026-32767 (GHSA-j7wh-x834-p3r7). The prior fix (commit d5e2d0bc) added an administrator check for SQL mode (method=2) in POST /api/search/fullTextSearchBlock, but the endpoint still does not enforce the application's read-only boundary: for method=2 it forwards caller-supplied SQL to the blocks database query path without calling model.CheckReadonly or CheckReadonlyStatementInBox. As a result, when a workspace runs in read-only mode (--readonly=true), an authenticated administrator can submit arbitrary SQL through /api/search/fullTextSearchBlock and obtain raw read access to the blocks database, even though the dedicated /api/query/sql endpoint is blocked in that mode. Fixed in v3.8.2.
AnalysisAI
Read-only mode bypass in SiYuan ≤ 3.8.1 allows an authenticated administrator to submit arbitrary SQL against the blocks database via POST /api/search/fullTextSearchBlock (method=2), circumventing the workspace's --readonly=true protection that correctly blocks the dedicated /api/query/sql endpoint. The prior fix for CVE-2026-32767 added an admin-role gate but omitted the model.CheckReadonly and CheckReadonlyStatementInBox calls, leaving the SQL code path unguarded. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Three concrete conditions must all be satisfied: (1) the attacker must hold a valid SiYuan administrator account - standard user accounts are insufficient; (2) the target workspace must be running with the --readonly=true flag active, as this is the protection mechanism being bypassed (workspaces not using this flag are not affected by this specific bypass); and (3) the attacker must be able to reach the SiYuan API endpoint over the network. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The provided CVSS 4.0 vector (AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H, score 8.7) contains two significant discrepancies with the described behavior: PR:L overstates accessibility since the description explicitly requires an administrator account, and VI:H/VA:H are not supported by the described impact of read-only SQL access to the blocks database. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | Upgrade SiYuan to v3.8.2, which introduces the missing CheckReadonly enforcement in the fullTextSearchBlock SQL mode path, consistent with how /api/query/sql enforces the read-only boundary. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, identify all SiYuan instances deployed in your environment and document which are running version 3.8.1 or earlier with --readonly=true mode enabled. …
Sign in for detailed remediation steps and compensating controls.
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