CVE-2026-34222: Open WebUI has Broken Access Control in Tool Valves

Severity: high (CVSS 7.7 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 5.0% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2026-04-01 · updated 2026-06-17
Weakness: CWE-285

Description

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.

Affected products

open-webui: before 0.8.11 — fixed in 0.8.11

How to fix

Upgrade to a fixed version: open-webui 0.8.11. Check the vendor advisory for mitigations.

References

https://github.com/open-webui/open-webui/releases/tag/v0.8.11
https://github.com/open-webui/open-webui/security/advisories/GHSA-7429-hxcv-268m
http://seclists.org/fulldisclosure/2026/Apr/4

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