CVE-2026-45345 json
Open WebUI: Missing authorization check at the model update function - models from other users can be updated
published 2026-05-14 5 mo ago modified 2026-07-13 3 mo ago also GHSA-gm54-m39w-grjp , PYSEC-2026-2727 , EUVD-2026-30650
- cvss
- 6.5
- 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 13%
- public exploits
- 0
- none known
Summary
Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. Prior to 0.5.7, a user can modify another user's model even if its visibility is set to Private. By changing the access permissions during editing, unauthorized access can be gained. This vulnerability is fixed in 0.5.7.
Patch / fix
- pypi open-webui 0.5.7
- openwebui open_webui 0.5.7
CISA SSVC
- Exploitation
- Proof of concept is public
- Automatable
- no
- Technical impact
- partial
- Assessed
- 5 mo ago
Exploit prediction
0.23% chance of exploitation in the next 30 days, higher than 13% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- github.com https://github.com/open-webui/open-webui/security/advisories/GHSA-gm54-m39w-grjp referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 6.5 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N |
| OSV | 3.1 | 6.5 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N |
| GitHub | 3.1 | 6.5 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| pypi | open-webui | <0.5.7 |
0.5.7 |
Affected products
- open-webui open-webui
Classification
- Weakness
-
- CWE-285 Improper Authorization
References
-
github.com
/open-webui/open-webui/security/advisories/GHSA-gm54-m39w-grjp
exploit, web, vendor-advisory
-
nvd.nist.gov
/vuln/detail/CVE-2026-45345
advisory
-
github.com
/open-webui/open-webui
package
-
pypi.org
/project/open-webui
package
-
github.com
/advisories/GHSA-gm54-m39w-grjp
advisory
Sources
- CVE List CVE-2026-45345
- GitHub Advisory GHSA-gm54-m39w-grjp
- NVD CVE-2026-45345
- OSV PYSEC-2026-2727
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