CVE-2026-41894 | SiYuan up to 3.6.4 url.PathUnescape path traversal

VDB-359531 · CVE-2026-41894 · GCVE-0-2026-41894 SIYUAN UP TO 3.6.4 URL.PATHUNESCAPE PATH TRAVERSAL HISTORYDIFFRELATEJSONXMLCTI CVSS Meta Temp Score Current Exploit Price (≈) CTI Interest Score 4.1 $0-$5k 0.56+ Summaryinfo A vulnerability marked as critical has been reported in SiYuan up to 3.6.4. The impacted element is the function url.PathUnescape. The manipulation leads to path traversal. This vulnerability is documented as CVE-2026-41894. The attack can be initiated remotely. There is not any exploit available. It is suggested to upgrade the affected component. Detailsinfo A vulnerability was found in SiYuan up to 3.6.4. It has been rated as critical. This issue affects the function url.PathUnescape. The manipulation with an unknown input leads to a path traversal vulnerability. Using CWE to declare the problem leads to CWE-22. The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory. Impacted is confidentiality. The summary by CVE is: 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. It is possible to read the advisory at github.com. The identification of this vulnerability is CVE-2026-41894 since 04/22/2026. The exploitation is known to be easy. The attack may be initiated remotely. Technical details of the vulnerability are known, but there is no available exploit. The attack technique deployed by this issue is T1006 according to MITRE ATT&CK. Upgrading to version 3.6.5 eliminates this vulnerability. Productinfo Name SiYuan Version 3.6.0 3.6.1 3.6.2 3.6.3 3.6.4 CPE 2.3info 🔒 🔒 🔒 CPE 2.2info 🔒 🔒 🔒 CVSSv4info VulDB Vector: 🔒 VulDB Reliability: 🔍 CNA CVSS-B Score: 🔒 CNA CVSS-BT Score: 🔒 CNA Vector: 🔒 CVSSv3info VulDB Meta Base Score: 4.3 VulDB Meta Temp Score: 4.1 VulDB Base Score: 4.3 VulDB Temp Score: 4.1 VulDB Vector: 🔒 VulDB Reliability: 🔍 CVSSv2info Vector Complexity Authentication Confidentiality Integrity Availability Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock VulDB Base Score: 🔒 VulDB Temp Score: 🔒 VulDB Reliability: 🔍 Exploitinginfo Class: Path traversal CWE: CWE-22 CAPEC: 🔒 ATT&CK: 🔒 Physical: No Local: No Remote: Yes Availability: 🔒 Status: Not defined Price Prediction: 🔍 Current Price Estimation: 🔒 0-Day Unlock Unlock Unlock Unlock Today Unlock Unlock Unlock Unlock Threat Intelligenceinfo Interest: 🔍 Active Actors: 🔍 Active APT Groups: 🔍 Countermeasuresinfo Recommended: Upgrade Status: 🔍 0-Day Time: 🔒 Upgrade: SiYuan 3.6.5 Timelineinfo 04/22/2026 CVE reserved 04/24/2026 +2 days Advisory disclosed 04/24/2026 +0 days VulDB entry created 04/24/2026 +0 days VulDB entry last update Sourcesinfo Advisory: github.com Status: Confirmed CVE: CVE-2026-41894 (🔒) GCVE (CVE): GCVE-0-2026-41894 GCVE (VulDB): GCVE-100-359531 Entryinfo Created: 04/24/2026 21:23 Changes: 04/24/2026 21:23 (66) Complete: 🔍 Cache ID: 99:B47:101 Discussion No comments yet. Languages: en. Please log in to comment. ◂ PreviousOverviewNext ▸