Vulnerability · Published May 15, 2026 · Assigned by GitHub_M

CVE-2026-45316Open WebUI: Read-Only Users Can Toggle Note Pin Status via Incorrect Permission Check (Write via Read-Only Access)

Low 3.5

In plain English

A low-severity incorrect authorization 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 15% of all known vulnerabilities). Ready-made attack tooling exists: public proof-of-concept code. Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)3.5Low

Exploit odds (30 days)0.2%top 85.4% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack tooling1Public PoC

Official description

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.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
PyPI	open-webui	0.9.3	GHSA-jx2x-j75f-xq3j
PyPI	open-webui	0.9.3	PYSEC-2026-2745

Affected products (as reported)

Vendor	Product	Versions
open-webui	open-webui	< 0.9.3

Weakness: CWE-863 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:N

References

https://github.com/open-webui/open-webui/security/advisories/GHSA-jx2x-j75f-xq3j x_refsource_CONFIRM