CVE-2026-41894

HIGH

SiYuan: Incomplete Fix Bypass for CVE-2026-30869: Path Traversal via Double URL Encoding in `/export/` Endpoint

Title source: cna

Description

SiYuan is an open-source personal knowledge management system. Prior to 3.6.5, the fix for CVE-2026-30869 only added a denylist check (IsSensitivePath) but did not address the root cause — a redundant url.PathUnescape() call in serveExport(). An authenticated attacker can use double URL encoding (%252e%252e) to traverse directories and read arbitrary workspace files including the full SQLite database (siyuan.db), kernel log, and all user documents. This vulnerability is fixed in 3.6.5.

References (3)

[X_Refsource_Confirm] https://github.com/siyuan-note/siyuan/security/advisories/GHSA-hjh7-r5w8-5872

[X_Refsource_Misc] https://github.com/siyuan-note/siyuan/commit/bb481e1290c4a34255652ede85a546504505d2a7

View Writeup ZIP pw:eip

[X_Refsource_Misc] https://github.com/siyuan-note/siyuan/releases/tag/v3.6.5

Scores

CVSS v4 7.1

EPSS 0.0004

EPSS Percentile 12.3%

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

Details

CWE

CWE-22

Status published

Products (1)

siyuan-note/siyuan < 3.6.5

Published Apr 24, 2026

Tracked Since Apr 24, 2026