gcdRadar
archive/Patch now/AIR-2026-0540
closedclosed 1 Apr 2026Patch now2 Disclosed vulnerabilityAI

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

Open WebUI

A vulnerability in Open WebUI permits broken access control within tool valves, exposing function calling interfaces. Users are advised to update their installations to a patched version.

disclosed CVENo confirmed exploitation, so this record is tracked as a disclosed vulnerability and not counted as an incident. It moves into the counts if CISA or the vendor confirms exploitation. Why

CVSS
7.7
EPSS
0.05 · top 8% · 2026-11-13
EPSS scores by FIRST
fix status
Fix status unknown
first report
1 Apr 2026
last update
1 Apr 2026
CVE ids
CVE-2026-34222other records

Timeline · 2

  1. 1 Apr 2026CVE-2026-34222: Open WebUI has Broken Access Control in Tool Valves
  2. 1 Apr 2026CVE-2026-34222: Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline.

Sources · 2

Advisories and databases

  1. 2026-04-01
    CVE-2026-34222: Open WebUI has Broken Access Control in Tool Valves
    GitHub Advisory Database · github.com/advisories/GHSA-7429-hxcv-268m
  2. 2026-04-01
    CVE-2026-34222: Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline.
    NVD · nvd.nist.gov/vuln/detail/CVE-2026-34222

Titles and links belong to their publishers. The summary above is written by gcdRadar in its own words; data is CC BY-SA 4.0.

Classification

lane
Patch now
AI role
Attack on AI
categories
Infrastructure vulnerability
severity
2 · Disclosed vulnerability
fix status
Fix status unknown
targets
Framework / tooling
owasp llm top 10
LLM03:2025 Supply Chain
mitre atlas
no technique for these categories
tags
broken-access-control
dates
happened 1 Apr 2026 · first reported 1 Apr 2026
origin
GitHub Advisory Database
Vulnerability record from NVD / the GitHub Advisory Database. This product uses the NVD API but is not endorsed or certified by the NVD.
record
confidence 0.95 · created 2026-10-18 07:00Z · updated 2026-10-18 10:04Z

Lane, AI role, categories and severity come from the classifier; the OWASP and ATLAS rows are derived from the categories. How these are assigned

Copy a brief

This record as a short Markdown brief, for a ticket, a chat or a coding agent.

the brief as text
# CVE-2026-34222: Open WebUI Broken Access Control in Tool Valves

https://gcdradar.vercel.app/incidents/cve-2026-34222-open-webui-broken-access-control-in-tool-valv · AIR-2026-0540 · closed 2026-04-01

- Lane: Patch now
- Severity: 2 (Disclosed vulnerability)
- Fix status: Fix status unknown
- First reported: 2026-04-01
- AI role: Attack on AI
- Products: Open WebUI
- CVE ids: CVE-2026-34222
- CVSS: 7.7

## Summary

A vulnerability in Open WebUI permits broken access control within tool valves, exposing function calling interfaces. Users are advised to update their installations to a patched version.

## What to do

No action recorded; read the sources below and the vendor's advisory.

## Latest updates

- 2026-04-01: CVE-2026-34222: Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. (https://nvd.nist.gov/vuln/detail/CVE-2026-34222)
- 2026-04-01: CVE-2026-34222: Open WebUI has Broken Access Control in Tool Valves (https://github.com/advisories/GHSA-7429-hxcv-268m)

## Sources

- 2026-04-01 GitHub Advisory Database: CVE-2026-34222: Open WebUI has Broken Access Control in Tool Valves https://github.com/advisories/GHSA-7429-hxcv-268m
- 2026-04-01 NVD: CVE-2026-34222: Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. https://nvd.nist.gov/vuln/detail/CVE-2026-34222

Verify against the vendor's advisory before changing production. Data CC BY-SA 4.0, https://gcdradar.vercel.app.

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