VULNERABILITY INTELLIGENCE
CVE-2026-82651
CVSS score6.9 MEDIUM
EPSS probability0.48%
CISA KEVNot currently listed
Published2026-08-30
Last modified2026-08-31
CVSS vectorCVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
Description
SiYuan before v3.8.1 does not apply the IsForbiddenAbsPath guard (introduced in GHSA-c8r8-95hg-mp34) to the /history/*path and /repo/diff/*path endpoints in kernel/server/serve.go. These routes require admin authentication but construct file paths independently, so an authenticated administrator can retrieve historical snapshots of sensitive files that the guard is meant to block, including data/.siyuan/publishAccess.json (plaintext publish-mode passwords) and files under data/templates/.
Weakness classification
- CWE-200: Exposure of Sensitive Information to an Unauthorized Actor