gcdRadar
archive/Patch now/AIR-2026-0640
closedclosed 8 May 2026Patch now2 Disclosed vulnerabilityAI

CVE-2026-44555: Open WebUI Base Model Routing Access Control Bypass

Open WebUI

Open WebUI features a vulnerability enabling base model routing to bypass access controls through model chaining mechanisms. The advisory details affected code paths awaiting updates.

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
7.6
EPSS
<0.01 · top 77% · 2026-11-13
EPSS scores by FIRST
fix status
Fix status unknown
first report
8 May 2026
last update
15 May 2026
CVE ids
CVE-2026-44555other records

Timeline · 2

  1. 8 May 2026CVE-2026-44555: Open WebUI's Base Model Routing Bypasses Access Control via Model Chaining
  2. 15 May 2026CVE-2026-44555: Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline.

Sources · 2

Advisories and databases

  1. 2026-05-08
    CVE-2026-44555: Open WebUI's Base Model Routing Bypasses Access Control via Model Chaining
    GitHub Advisory Database · github.com/advisories/GHSA-9vvh-qmjx-p4q8
  2. 2026-05-15
    CVE-2026-44555: Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline.
    NVD · nvd.nist.gov/vuln/detail/CVE-2026-44555

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
model-chainingrouting
dates
happened 8 May 2026 · first reported 8 May 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-2026-44555: Open WebUI Base Model Routing Access Control Bypass

https://gcdradar.vercel.app/incidents/cve-2026-44555-open-webui-base-model-routing-access-control · AIR-2026-0640 · closed 2026-05-08

- Lane: Patch now
- Severity: 2 (Disclosed vulnerability)
- Fix status: Fix status unknown
- First reported: 2026-05-08
- AI role: Attack on AI
- Products: Open WebUI
- CVE ids: CVE-2026-44555
- CVSS: 7.6

## Summary

Open WebUI features a vulnerability enabling base model routing to bypass access controls through model chaining mechanisms. The advisory details affected code paths awaiting updates.

## What to do

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

## Latest updates

- 2026-05-15: CVE-2026-44555: Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. (https://nvd.nist.gov/vuln/detail/CVE-2026-44555)
- 2026-05-08: CVE-2026-44555: Open WebUI's Base Model Routing Bypasses Access Control via Model Chaining (https://github.com/advisories/GHSA-9vvh-qmjx-p4q8)

## Sources

- 2026-05-08 GitHub Advisory Database: CVE-2026-44555: Open WebUI's Base Model Routing Bypasses Access Control via Model Chaining https://github.com/advisories/GHSA-9vvh-qmjx-p4q8
- 2026-05-15 NVD: CVE-2026-44555: Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. https://nvd.nist.gov/vuln/detail/CVE-2026-44555

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

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