SiYuan up to 3.6.x Publish Mode conf/conf.json path traversal

Summaryinfo

A vulnerability labeled as critical has been found in SiYuan up to 3.6.x. Affected is an unknown function of the file conf/conf.json of the component Publish Mode. The manipulation results in path traversal. This vulnerability is cataloged as CVE-2026-54066. The attack may be launched remotely. There is no exploit available. The affected component should be upgraded.

Detailsinfo

A vulnerability was found in SiYuan up to 3.6.x. It has been classified as critical. Affected is an unknown part of the file conf/conf.json of the component Publish Mode. The manipulation with an unknown input leads to a path traversal vulnerability. CWE is classifying the issue as 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. This is going to have an impact on confidentiality. CVE summarizes:

SiYuan is an open-source personal knowledge management system. Prior to 3.7.0, the patch for CVE-2026-41894 ("Path Traversal via Double URL Encoding") sanitized the /export/ route but the identical root cause remains in the /assets/*path route. In publish mode (anonymous read-only HTTP endpoint, default port 6808), an unauthenticated remote attacker can read arbitrary files inside WorkspaceDir — including conf/conf.json (which contains the AccessAuthCode SHA256 hash, API token, and sync keys), temp/siyuan.db, temp/blocktree.db, and siyuan.log — by double-URL-encoding .. segments. This vulnerability is fixed in 3.7.0.

The advisory is available at github.com. This vulnerability is traded as CVE-2026-54066 since 06/11/2026. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. Technical details are known, but there is no available exploit. This vulnerability is assigned to T1006 by the MITRE ATT&CK project.

By approaching the search of inurl:conf/conf.json it is possible to find vulnerable targets with Google Hacking.

Upgrading to version 3.7.0 eliminates this vulnerability.

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Productinfo

Name

• SiYuan

Version

• 3.0
• 3.1
• 3.2
• 3.3
• 3.4
• 3.5
• 3.6

CPE 2.3info

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CPE 2.2info

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