CVE-2026-87815

high

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.

References

https://www.vulncheck.com/advisories/siyuan-before-3.8.2-path-traversal-via-removeriffdeck

https://github.com/siyuan-note/siyuan/security/advisories/GHSA-94vh-rpgr-rpwc

Details

Source: Mitre, NVD

Published: 2026-09-09

Updated: 2026-09-09

Risk Information

CVSS v2

Base Score: 7.7

Vector: CVSS2#AV:N/AC:L/Au:M/C:N/I:C/A:C

Severity: High

CVSS v3

Base Score: 8.7

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

Severity: High

CVSS v4

Base Score: 8.4

Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:H/VA:H/SC:N/SI:H/SA:H

Severity: High

EPSS

EPSS: 0.00266