CVE-2026-45147: CWE-285: Improper Authorization in siyuan-note siyuan
SiYuan is an open-source personal knowledge management system. Prior to 3.7.0, POST /api/tag/getTag is registered with model.CheckAuth only, omitting both model.CheckAdminRole and model.CheckReadonly, despite the handler performing a configuration write that is normally guarded by both. Any authenticated user — including publish-service RoleReader accounts and RoleEditor accounts on a read-only workspace — can call this endpoint with a sort argument to mutate model.Conf.Tag.Sort and trigger model.Conf.Save(), which atomically rewrites the entire workspace conf.json. This vulnerability is fixed in 3.7.0.
AI Analysis
Technical Summary
SiYuan versions before 3.7.0 have an authorization flaw in the POST /api/tag/getTag API endpoint. The endpoint is protected only by model.CheckAuth, lacking checks for admin or readonly roles, despite performing writes to the workspace configuration file (conf.json). Authenticated users with limited roles can exploit this to reorder tags and trigger saving the entire workspace configuration, potentially altering settings they should not control. This vulnerability is addressed in SiYuan 3.7.0.
Potential Impact
The vulnerability allows authenticated users with read-only or limited roles to modify the workspace configuration by changing tag sorting. This impacts the integrity of the workspace configuration but does not affect confidentiality or availability. There is no indication of exploitation in the wild.
Mitigation Recommendations
Upgrade SiYuan to version 3.7.0 or later, where this authorization issue is fixed. Since this is not a cloud service, users must apply the update themselves. Patch status is confirmed by the vendor stating the fix is in version 3.7.0.
CVE-2026-45147: CWE-285: Improper Authorization in siyuan-note siyuan
Description
SiYuan is an open-source personal knowledge management system. Prior to 3.7.0, POST /api/tag/getTag is registered with model.CheckAuth only, omitting both model.CheckAdminRole and model.CheckReadonly, despite the handler performing a configuration write that is normally guarded by both. Any authenticated user — including publish-service RoleReader accounts and RoleEditor accounts on a read-only workspace — can call this endpoint with a sort argument to mutate model.Conf.Tag.Sort and trigger model.Conf.Save(), which atomically rewrites the entire workspace conf.json. This vulnerability is fixed in 3.7.0.
CVSS v3.1
Score 4.3medium
Affected software
pkg:github/siyuan-note/siyuanRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
SiYuan versions before 3.7.0 have an authorization flaw in the POST /api/tag/getTag API endpoint. The endpoint is protected only by model.CheckAuth, lacking checks for admin or readonly roles, despite performing writes to the workspace configuration file (conf.json). Authenticated users with limited roles can exploit this to reorder tags and trigger saving the entire workspace configuration, potentially altering settings they should not control. This vulnerability is addressed in SiYuan 3.7.0.
Potential Impact
The vulnerability allows authenticated users with read-only or limited roles to modify the workspace configuration by changing tag sorting. This impacts the integrity of the workspace configuration but does not affect confidentiality or availability. There is no indication of exploitation in the wild.
Mitigation Recommendations
Upgrade SiYuan to version 3.7.0 or later, where this authorization issue is fixed. Since this is not a cloud service, users must apply the update themselves. Patch status is confirmed by the vendor stating the fix is in version 3.7.0.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-05-08T20:44:38.963Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a062b6cec166c07b00def93
Added to database: 05/14/2026, 20:07:08 UTC
Last enriched: 05/14/2026, 20:22:36 UTC
Last updated: 07/02/2026, 20:51:20 UTC
Views: 107
Community Reviews
0 reviewsCrowdsource mitigation strategies, share intel context, and vote on the most helpful responses. Sign in to add your voice and help keep defenders ahead.
Want to contribute mitigation steps or threat intel context? Sign in or create an account to join the community discussion.
Actions
Updates to AI analysis require Pro Console access. Upgrade inside Console → Billing.
External Links
Need more coverage?
Upgrade to Pro Console for AI refresh and higher limits.
For incident response and remediation, OffSeq services can help resolve threats faster.
Latest Threats
Check if your credentials are on the dark web
Instant breach scanning across billions of leaked records. Free tier available.