Vulnerability · Published Apr 16, 2026 · Assigned by GitHub_M
CVE-2026-40259SiYuan: Publish Reader Can Arbitrarily Delete Attribute View Files via removeUnusedAttributeView API
High 8.1
In plain English
A high-severity security flaw 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 34% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official description
SiYuan is an open-source personal knowledge management system. In versions 3.6.3 and below, the /api/av/removeUnusedAttributeView endpoint is protected only by generic authentication that accepts publish-service RoleReader tokens. The handler passes a caller-controlled id directly to a model function that unconditionally deletes the corresponding attribute view file from the workspace without verifying that the caller has write privileges or that the target attribute view is actually unused. An authenticated publish-service reader can permanently delete arbitrary attribute view definitions by extracting publicly exposed data-av-id values from published content, causing breakage of database views and workspace rendering until manually restored. This issue has been fixed in version 3.6.4.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Go | github.com/siyuan-note/siyuan/kernel | 0.0.0-20260407035653-2f416e5253f1 | GHSA-7m5h-w69j-qggg |
| Go | github.com/siyuan-note/siyuan/kernel | 0.0.0-20260407035653-2f416e5253f1 | GO-2026-5229 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| siyuan-note | siyuan | < 0.0.0-20260407035653-2f416e5253f1< 3.6.4 |
Weakness: CWE-285 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H
References
- https://github.com/siyuan-note/siyuan/security/advisories/GHSA-7m5h-w69j-qggg x_refsource_CONFIRM
- https://github.com/siyuan-note/siyuan/releases/tag/v3.6.4 x_refsource_MISC