CVE-2026-87815

HIGH 8.7

SiYuan before v3.8.2 Path Traversal via removeRiffDeck

CVSS Score

8.7

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-73
Vendor	siyuan-note
Product	siyuan
Published	Sep 9, 2026
Last Updated	Sep 14, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:N/I:H/A:H

Attack Vector

Network

Attack Complexity

Low

Privileges Required

High

User Interaction

None

Scope

Changed

Confidentiality

None

Integrity

High

Availability

High

Affected Versions

siyuan-note / siyuan

0 < 3.8.2

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/siyuan-note/siyuan/security/advisories/GHSA-94vh-rpgr-rpwc vulncheck.com: https://www.vulncheck.com/advisories/siyuan-before-3.8.2-path-traversal-via-removeriffdeck

Credits

🔍 manus-use