gcdRadar
archive/Patch now/AIR-2026-0299
closedclosed 12 Oct 2026Patch now2 Disclosed vulnerabilityAI

CVE-2026-109287: Open WebUI knowledge base authorization flaw exposes folder metadata

Open WebUI

Open WebUI contained an authorization flaw where knowledge base file listings failed to verify directory ownership. Users could query arbitrary directories to expose folder names, owner IDs, and parent hierarchy.

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
5.3
EPSS
<0.01 · top 80% · 2026-11-13
EPSS scores by FIRST
fix status
Fix status unknown
first report
12 Oct 2026
last update
12 Oct 2026
CVE ids
CVE-2026-109287other records

Timeline · 1

  1. 12 Oct 2026CVE-2026-109287: Open WebUI from 0.9.6 before 0.11.4 contains an authorization flaw where the knowledge base file listing does not verify that a…

Sources · 1

Advisories and databases

  1. 2026-10-12
    CVE-2026-109287: Open WebUI from 0.9.6 before 0.11.4 contains an authorization flaw where the knowledge base file listing does not verify that a…
    NVD · nvd.nist.gov/vuln/detail/CVE-2026-109287

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 vulnerabilityData leak
severity
2 · Disclosed vulnerability
fix status
Fix status unknown
targets
Framework / tooling
owasp llm top 10
LLM02:2025 Sensitive Information DisclosureLLM03:2025 Supply Chain
mitre atlas
no technique for these categories
tags
authorizationinformation-disclosure
dates
happened 12 Oct 2026 · first reported 12 Oct 2026
origin
NVD
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 06:33Z · updated 2026-10-18 06:33Z

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-2026-109287: Open WebUI knowledge base authorization flaw exposes folder metadata

https://gcdradar.vercel.app/incidents/cve-2026-109287-open-webui-knowledge-base-authorization-flaw · AIR-2026-0299 · closed 2026-10-12

- Lane: Patch now
- Severity: 2 (Disclosed vulnerability)
- Fix status: Fix status unknown
- First reported: 2026-10-12
- AI role: Attack on AI
- Products: Open WebUI
- CVE ids: CVE-2026-109287
- CVSS: 5.3

## Summary

Open WebUI contained an authorization flaw where knowledge base file listings failed to verify directory ownership. Users could query arbitrary directories to expose folder names, owner IDs, and parent hierarchy.

## What to do

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

## Latest updates

- 2026-10-12: CVE-2026-109287: Open WebUI from 0.9.6 before 0.11.4 contains an authorization flaw where the knowledge base file listing does not verify that a… (https://nvd.nist.gov/vuln/detail/CVE-2026-109287)

## Sources

- 2026-10-12 NVD: CVE-2026-109287: Open WebUI from 0.9.6 before 0.11.4 contains an authorization flaw where the knowledge base file listing does not verify that a… https://nvd.nist.gov/vuln/detail/CVE-2026-109287

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

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