What is CVE-2026-34222?

CVE-2026-34222 is a high-severity vulnerability in Open-Webui, classified under Improper Authorization. CVSS score: 7.7/10. Published 2026-04-01.

How severe is CVE-2026-34222?

High severity. CVSS v3 base score is 7.7 out of 10.

Auth bypass in Open-Webui

CVE-2026-34222

Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. Prior to version 0.8.11, there is a broken access control vulnerability in tool values. This issue has been patched in version 0.8.11.

Published 2026-04-01 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.7 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N.

EPSS exploit prediction

EPSS: 0.005 (37.3th percentile), scored 2026-10-03.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 37th percentile — 37.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.050 · newest: 0.005 · change: -0.046

Affected products

Open-Webui — versions < 0.8.11
Openwebui Open Webui

Weakness classification (CWE)

CWE-285 — Improper Authorization

References

github.com/open-webui/open-webui/security/advisories/GHSA-7429-hxcv-268m (Vendor Advisory)
github.com/open-webui/open-webui/releases/tag/v0.8.11 (Release Notes)
af854a3a-2127-422b-91ae-364da2661108 (Exploit, Mailing List, Third Party Advisory)

Frequently asked questions

What is CVE-2026-34222?: CVE-2026-34222 is a high-severity vulnerability in Open-Webui, classified under Improper Authorization. CVSS score: 7.7/10. Published 2026-04-01.
How severe is CVE-2026-34222?: High severity. CVSS v3 base score is 7.7 out of 10.