CVE-2026-45316 json
Open WebUI: Read-Only Users Can Toggle Note Pin Status via Incorrect Permission Check (Write via Read-Only Access)
published 2026-05-14 5 mo ago modified 2026-07-13 3 mo ago also EUVD-2026-30660 , GHSA-jx2x-j75f-xq3j , PYSEC-2026-2745
- cvss
- 3.5
- 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 14%
- public exploits
- 0
- none known
Summary
Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. Prior to 0.9.3, the POST /api/v1/notes/{id}/pin endpoint performs a write operation (toggling the is_pinned field) but only checks for read permission. Users with read-only access to a shared note can pin/unpin it, which is a state-modifying action that should require write permission. This vulnerability is fixed in 0.9.3.
Patch / fix
- pypi open-webui 0.9.3
- openwebui open_webui 0.9.3
CISA SSVC
- Exploitation
- Proof of concept is public
- Automatable
- no
- Technical impact
- partial
- Assessed
- 5 mo ago
Exploit prediction
0.24% chance of exploitation in the next 30 days, higher than 14% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- github.com https://github.com/open-webui/open-webui/security/advisories/GHSA-jx2x-j75f-xq3j referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 3.5 | CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:N |
| GitHub | 3.1 | 3.5 | CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:N |
| OSV | 3.1 | 3.5 | CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:N |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| pypi | open-webui | <0.9.3 |
0.9.3 |
Affected products
- open-webui open-webui
Classification
- Weakness
-
- CWE-863 Incorrect Authorization
References
-
github.com
/open-webui/open-webui/security/advisories/GHSA-jx2x-j75f-xq3j
exploit, web, mitigation, vendor-advisory
-
nvd.nist.gov
/vuln/detail/CVE-2026-45316
advisory
-
github.com
/open-webui/open-webui
package
-
github.com
/open-webui/open-webui/releases/tag/v0.9.3
web
-
pypi.org
/project/open-webui
package
-
github.com
/advisories/GHSA-jx2x-j75f-xq3j
advisory
Sources
- CVE List CVE-2026-45316
- GitHub Advisory GHSA-jx2x-j75f-xq3j
- NVD CVE-2026-45316
- OSV PYSEC-2026-2745
Fencer Vulns 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.