CVE-2026-109309CWE-22path-traversal

CVE-2026-109309

Medium · published October 12, 2026

CVSS v3.1
6.5
EPSS
0%
Percentile
30.9
In the wild
Unconfirmed
What it is

SiYuan v3.7.0 before v3.8.6 contains an absolute path traversal vulnerability in the kernel's private plugin HTTP server, which passes a kernel plugin handler's ResponseFile.Path to gin's Context.File without validation. Attackers supplying a malicious kernel plugin can return an absolute path to read any file readable by the SiYuan process, including the API token and conf.json.

The record
Technical detail
CVSS v3.1
6.5 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
CVSS v4.0
6.9 · CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
EPSS
0.00381 · 30.9th percentile
Weakness
CWE-22 · Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
Published
2026-10-12T21:17Z
References (3)
https://github.com/siyuan-note/siyuan/commit/c6494375ea40ee973f430f0e85d50f1862a30d81 · [email protected]https://github.com/siyuan-note/siyuan/security/advisories/GHSA-phmw-4rgv-r4xv · [email protected]https://www.vulncheck.com/advisories/siyuan-3.7.0-before-3.8.6-arbitrary-file-read-via-plugin-responsefile-path · [email protected]
EPSS history
Timeline
  • 14 OCT 03:27Z
    EPSS moved — → 0%
    epss
  • 12 OCT 16:05Z
    SiYuan v3.7.0 before v3.8.6 Arbitrary File Read via Plugin ResponseFile.Path
    cvelistv5
  • 12 OCT 16:05Z
    SiYuan v3.7.0 before v3.8.6 Arbitrary File Read via Plugin ResponseFile.Path
    cvelistv5