CVE-2026-45147 json
SiYuan: Broken access control in SiYuan `/api/tag/getTag` — Reader role can mutate `Conf.Tag.Sort` and persist to disk
published 2026-05-13 5 mo ago modified 2026-06-25 4 mo ago also GHSA-6r88-8v7q-q4p2 , GO-2026-5188 , EUVD-2026-30360
- cvss
- 4.3
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.2%
- EPSS 0.2% chance of exploitation in 30 days, percentile 4%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- go github.com/siyuan-note/siyuan/kernel 0.0.0-20260512140701-d7b77d945e0d
- 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
- 5 mo ago
Exploit prediction
0.15% chance of exploitation in the next 30 days, higher than 4% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- github.com https://github.com/siyuan-note/siyuan/security/advisories/GHSA-6r88-8v7q-q4p2 referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 4.3 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N |
| GitHub | 3.1 | 4.3 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| go | github.com/siyuan-note/siyuan/kernel | <0.0.0-20260512140701-d7b77d945e0d |
0.0.0-20260512140701-d7b77d945e0d |
Affected products
- siyuan-note siyuan
Classification
References
-
github.com
/siyuan-note/siyuan/security/advisories/GHSA-6r88-8v7q-q4p2
exploit, web, advisory
-
nvd.nist.gov
/vuln/detail/CVE-2026-45147
advisory
-
github.com
/siyuan-note/siyuan
package
Sources
- CVE List CVE-2026-45147
- GitHub Advisory GHSA-6r88-8v7q-q4p2
- NVD CVE-2026-45147
- OSV GO-2026-5188
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