Vulnerability · Published May 15, 2026 · Assigned by GitHub_M

CVE-2026-45345Open WebUI: Missing authorization check at the model update function - models from other users can be updated

Medium 6.5

In plain English

A medium-severity security flaw in open-webui from open-webui. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 13% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)6.5Medium

Exploit odds (30 days)0.2%top 86.6% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official description

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.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
PyPI	open-webui	0.5.7	GHSA-gm54-m39w-grjp
PyPI	open-webui	0.5.7	PYSEC-2026-2727

Affected products (as reported)

Vendor	Product	Versions
open-webui	open-webui	< 0.5.7

Weakness: CWE-285 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N

References

https://github.com/open-webui/open-webui/security/advisories/GHSA-gm54-m39w-grjp x_refsource_CONFIRM