CVE-2026-100637CWE-73

CVE-2026-100637

High · published September 26, 2026

CVSS v3.1
7.6
EPSS
0%
Percentile
40.0
In the wild
Unconfirmed
What it is

SiYuan versions before v3.8.4 contain a path traversal vulnerability in the checkoutRepo endpoint that allows authenticated administrators to write JSON files outside the workspace. Attackers can supply a sessionID parameter containing directory traversal sequences to overwrite arbitrary JSON files in pre-existing kernel-writable directories outside workspace boundaries.

The record
Technical detail
CVSS v3.1
7.6 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:N/I:H/A:L
CVSS v4.0
8.3 · CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:H/VA:L/SC:N/SI:H/SA:L
EPSS
0.00474 · 40.0th percentile
Weakness
CWE-73 · External Control of File Name or Path
Published
2026-09-26T18:16Z
References (3)
https://github.com/siyuan-note/siyuan/security/advisories/GHSA-jhmh-hr4g-c5g2 · [email protected]https://www.vulncheck.com/advisories/siyuan-before-3.8.4-path-traversal-via-checkoutrepo-sessionid · [email protected]https://github.com/siyuan-note/siyuan/security/advisories/GHSA-jhmh-hr4g-c5g2 · 134c704f-9b21-4f2e-91b3-4a467353bcc0
EPSS history
Timeline
  • 28 SEP 03:25Z
    EPSS moved — → 0%
    epss
  • 26 SEP 13:23Z
    SiYuan before v3.8.4 Path Traversal via checkoutRepo sessionID
    cvelistv5