CVE-2026-40318 json
SiYuan: Publish Reader Path Traversal Delete via `removeUnusedAttributeView`
published 6mo ago modified last mo. also EUVD-2026-23328 , GHSA-vw86-c94w-v3x4 , GO-2026-5679
- cvss
- 8.5
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.3%
- EPSS 0.3% chance of exploitation in 30 days, percentile 21%
- public exploits
- 0
- none known
Summary
SiYuan is an open-source personal knowledge management system. In versions 3.6.3 and prior, the /api/av/removeUnusedAttributeView endpoint constructs a filesystem path using the user-controlled id parameter without validation or path boundary enforcement. An attacker can inject path traversal sequences such as ../ into the id value to escape the intended directory and delete arbitrary .json files on the server, including global configuration files and workspace metadata. This issue has been fixed in version 3.6.4.
Patch / fix
- go github.com/siyuan-note/siyuan/kernel 3.6.40.0.0-20260407035653-2f416e5253f1
- b3log siyuan 3.6.4
- govulncheck-vulndb openSUSE Leap 16.0 0.0.20260723T184607-160000.1.1
opensuse advisories openSUSE-SU-2026:21483-1
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- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 6mo ago
Exploit prediction
0.29% chance of exploitation in the next 30 days, higher than 21% of all scored CVEs (FIRST EPSS, 2026-11-09).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 8.5 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:L/A:H |
| GitHub | 3.1 | 8.5 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:L/A:H |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| go | github.com/siyuan-note/siyuan/kernel | <3.6.40.0.0-20260407035653-2f416e5253f1 all versions |
3.6.40.0.0-20260407035653-2f416e5253f1 |
Affected products
- siyuan-note siyuan
Classification
- Weakness
-
- CWE-24 Path Traversal: '../filedir'
References
-
github.com
/siyuan-note/siyuan/security/advisories/GHSA-vw86-c94w-v3x4
web, third-party-advisory, advisory
-
github.com
/siyuan-note/siyuan/releases/tag/v3.6.4
web, release-notes
-
nvd.nist.gov
/vuln/detail/CVE-2026-40318
advisory
-
github.com
/siyuan-note/siyuan
package
Sources
- CVE List CVE-2026-40318
- GitHub Advisory GHSA-vw86-c94w-v3x4
- NVD CVE-2026-40318
- OSV GO-2026-5679
Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.
CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.