CVE-2026-40259 json
SiYuan: Publish Reader Can Arbitrarily Delete Attribute View Files via removeUnusedAttributeView API
published 2026-04-10 6 mo ago modified 2026-06-25 4 mo ago also GHSA-7m5h-w69j-qggg , GO-2026-5229 , EUVD-2026-23324
- cvss
- 8.1
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.4%
- EPSS 0.4% chance of exploitation in 30 days, percentile 34%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- go github.com/siyuan-note/siyuan/kernel 0.0.0-20260407035653-2f416e5253f1
- b3log siyuan 3.6.4
- govulncheck-vulndb openSUSE Leap 16.0 0.0.20260723T184607-160000.1.1
opensuse advisories openSUSE-SU-2026:21483-1
CISA SSVC
- Exploitation
- Proof of concept is public
- Automatable
- no
- Technical impact
- partial
- Assessed
- 6 mo ago
Exploit prediction
0.40% chance of exploitation in the next 30 days, higher than 34% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- github.com https://github.com/siyuan-note/siyuan/security/advisories/GHSA-7m5h-w69j-qggg referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 8.1 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H |
| GitHub | 3.1 | 8.1 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| go | github.com/siyuan-note/siyuan/kernel | <0.0.0-20260407035653-2f416e5253f1 |
0.0.0-20260407035653-2f416e5253f1 |
Affected products
- siyuan-note siyuan
Classification
- Weakness
-
- CWE-285 Improper Authorization
References
-
github.com
/siyuan-note/siyuan/security/advisories/GHSA-7m5h-w69j-qggg
exploit, web, third-party-advisory, advisory
-
github.com
/siyuan-note/siyuan/releases/tag/v3.6.4
web, release-notes
-
nvd.nist.gov
/vuln/detail/CVE-2026-40259
advisory
-
github.com
/siyuan-note/siyuan
package
Sources
- CVE List CVE-2026-40259
- GitHub Advisory GHSA-7m5h-w69j-qggg
- NVD CVE-2026-40259
- OSV GO-2026-5229
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