Vulnerability · Published Apr 24, 2026 · Assigned by GitHub_M

CVE-2026-41894SiYuan: Incomplete Fix Bypass for CVE-2026-30869: Path Traversal via Double URL Encoding in `/export/` Endpoint

High 7.1

In plain English

A high-severity path traversal in siyuan from siyuan-note. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 32% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 4.0)7.1High

Exploit odds (30 days)0.4%top 68.4% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official 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.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
Go	github.com/siyuan-note/siyuan/kernel	3.6.5	GHSA-hjh7-r5w8-5872
Go	github.com/siyuan-note/siyuan/kernel	no fix listed	GO-2026-5429

Affected products (as reported)

Vendor	Product	Versions
siyuan-note	siyuan	< 3.6.5

Weakness: CWE-22 · Vector: 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

References

https://github.com/siyuan-note/siyuan/security/advisories/GHSA-hjh7-r5w8-5872 x_refsource_CONFIRM
https://github.com/siyuan-note/siyuan/commit/bb481e1290c4a34255652ede85a546504505d2a7 x_refsource_MISC
https://github.com/siyuan-note/siyuan/releases/tag/v3.6.5 x_refsource_MISC