gcdRadar
archive/Patch now/AIR-2026-0627
closedclosed 8 May 2026Patch now2 Disclosed vulnerabilityAI

CVE-2026-44559: Open WebUI missing access check on channel members

Open WebUI

Open WebUI omits access checks on standard channel member listing endpoints, exposing participant details to authenticated users without appropriate permissions. An advisory details the vulnerability for users to update.

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
4.3
EPSS
<0.01 · top 88% · 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-2026-44559other records

Timeline · 2

  1. 8 May 2026CVE-2026-44559: Open WebUI Missing Access Check on Channel Members Endpoint for Standard Channels
  2. 15 May 2026CVE-2026-44559: Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline.

Sources · 2

Advisories and databases

  1. 2026-05-08
    CVE-2026-44559: Open WebUI Missing Access Check on Channel Members Endpoint for Standard Channels
    GitHub Advisory Database · github.com/advisories/GHSA-c7wp-3qh5-55pv
  2. 2026-05-15
    CVE-2026-44559: Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline.
    NVD · nvd.nist.gov/vuln/detail/CVE-2026-44559

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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
access-control
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-2026-44559: Open WebUI missing access check on channel members

https://gcdradar.vercel.app/incidents/cve-2026-44559-open-webui-missing-access-check-on-channel-me · AIR-2026-0627 · 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-2026-44559
- CVSS: 4.3

## Summary

Open WebUI omits access checks on standard channel member listing endpoints, exposing participant details to authenticated users without appropriate permissions. An advisory details the vulnerability for users to update.

## What to do

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

## Latest updates

- 2026-05-15: CVE-2026-44559: Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. (https://nvd.nist.gov/vuln/detail/CVE-2026-44559)
- 2026-05-08: CVE-2026-44559: Open WebUI Missing Access Check on Channel Members Endpoint for Standard Channels (https://github.com/advisories/GHSA-c7wp-3qh5-55pv)

## Sources

- 2026-05-08 GitHub Advisory Database: CVE-2026-44559: Open WebUI Missing Access Check on Channel Members Endpoint for Standard Channels https://github.com/advisories/GHSA-c7wp-3qh5-55pv
- 2026-05-15 NVD: CVE-2026-44559: Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. https://nvd.nist.gov/vuln/detail/CVE-2026-44559

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

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