CVE-2026-87815 Details
Description
SiYuan versions before v3.8.2 contain a path traversal vulnerability in the /api/riff/removeRiffDeck endpoint that fails to validate the deckID parameter. An authenticated administrator can supply path traversal sequences to delete arbitrary .deck and .cards files outside the workspace directory.
A path traversal vulnerability has been identified in SiYuan versions prior to v3.8.2, specifically within the /api/riff/removeRiffDeck endpoint. This vulnerability arises because the deckID parameter is not properly validated, allowing authenticated administrators to manipulate the parameter and delete arbitrary .deck and .cards files located outside the designated workspace directory. On shared hosts, this could result in the loss of flashcard data from other workspaces.
Users should update to SiYuan version 3.8.2 or later, where this vulnerability has been addressed.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed Sep 9, 2026CISA-ADP
Assessed Sep 14, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/siyuan-note/siyuan/security/advisories/GHSA-94vh-rpgr-rpwc | CISA-ADP | AdvisoryExploitTechnical AnalysisVendor |
| https://github.com/siyuan-note/siyuan/security/advisories/GHSA-94vh-rpgr-rpwc | [email protected] | AdvisoryExploitTechnical AnalysisVendor |
| https://www.vulncheck.com/advisories/siyuan-before-3.8.2-path-traversal-via-removeriffdeck | [email protected] | Advisory |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-73 | External Control of File Name or Path | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| SiYuan | <= 3.8.1 (semver) |
CPE
Remediation
| |
Change History
2 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Sep 14, 2026 | CVE Modified | CISA-ADP |
| Sep 9, 2026 | New CVE Received | [email protected] |