Vulnerability · Published Jun 23, 2026 · Assigned by GitHub_M

CVE-2026-54022Open WebUI: Any authenticated user can read other users' private notes via Socket.IO

Medium 5.3

In plain English

A medium-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 0.3% (higher than 28% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)5.3Medium

Exploit odds (30 days)0.3%top 71.6% 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 0.8.11, the ydoc:document:join Socket.IO handler checks note ownership only when the document_id starts with note: (colon). However, the YdocManager storage layer normalizes all document IDs by replacing colons with underscores (document_id.replace(":", "_")). An attacker can join a document room using note_<id> (underscore) instead of note:<id> (colon), bypassing the authorization check entirely while accessing the same underlying Yjs document. The server then returns the full document state, leaking the victim's private note contents. This vulnerability is fixed in 0.8.11.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
PyPI	open-webui	0.8.11	GHSA-8788-j68r-3cgh
PyPI	open-webui	0.8.11	PYSEC-2026-2712

Affected products (as reported)

Vendor	Product	Versions
open-webui	open-webui	< 0.8.11

Weakness: CWE-706, CWE-863 · Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N

References

https://github.com/open-webui/open-webui/security/advisories/GHSA-8788-j68r-3cgh x_refsource_CONFIRM