gcdRadar
archive/Patch now/AIR-2026-0799
closedclosed 19 Feb 2026Patch now2 Disclosed vulnerabilityAI

CVE-2026-26192: Open WebUI stored XSS via citation document metadata

Open WebUI

Manually modified chat history can inject HTML properties into document metadata in Open WebUI. This causes citation previews to render document contents as HTML in an iFrame, triggering stored XSS.

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
7.3
EPSS
<0.01 · top 86% · 2026-11-13
EPSS scores by FIRST
fix status
Fix status unknown
first report
19 Feb 2026
last update
7 Jul 2026
CVE ids
CVE-2026-26192other records

Timeline · 2

  1. 19 Feb 2026CVE-2026-26192: Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline.
  2. 7 Jul 2026CVE-2026-26192: Open WebUI vulnerable to Stored XSS via iFrame in citations model

Sources · 2

Advisories and databases

  1. 2026-02-19
    CVE-2026-26192: Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline.
    NVD · nvd.nist.gov/vuln/detail/CVE-2026-26192
  2. 2026-07-07
    CVE-2026-26192: Open WebUI vulnerable to Stored XSS via iFrame in citations model
    GitHub Advisory Database · github.com/advisories/GHSA-xc8p-9rr6-97r2

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
xss
dates
happened 7 Jul 2026 · first reported 19 Feb 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-2026-26192: Open WebUI stored XSS via citation document metadata

https://gcdradar.vercel.app/incidents/cve-2026-26192-open-webui-stored-xss-via-citation-document-m · AIR-2026-0799 · closed 2026-02-19

- Lane: Patch now
- Severity: 2 (Disclosed vulnerability)
- Fix status: Fix status unknown
- First reported: 2026-02-19 (happened 2026-07-07)
- AI role: Attack on AI
- Products: Open WebUI
- CVE ids: CVE-2026-26192
- CVSS: 7.3

## Summary

Manually modified chat history can inject HTML properties into document metadata in Open WebUI. This causes citation previews to render document contents as HTML in an iFrame, triggering stored XSS.

## What to do

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

## Latest updates

- 2026-07-07: CVE-2026-26192: Open WebUI vulnerable to Stored XSS via iFrame in citations model (https://github.com/advisories/GHSA-xc8p-9rr6-97r2)
- 2026-02-19: CVE-2026-26192: Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. (https://nvd.nist.gov/vuln/detail/CVE-2026-26192)

## Sources

- 2026-02-19 NVD: CVE-2026-26192: Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. https://nvd.nist.gov/vuln/detail/CVE-2026-26192
- 2026-07-07 GitHub Advisory Database: CVE-2026-26192: Open WebUI vulnerable to Stored XSS via iFrame in citations model https://github.com/advisories/GHSA-xc8p-9rr6-97r2

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

Related

  1. closed7.3
    Open WebUI CVE-2026-26193: Open WebUI stored XSS via iFrame embed properties

    Patch now · Disclosed · since 7 Jul 2026 · updated 7 Jul 2026 · CVE-2026-26193

    AI
  2. closed7.7
    Open WebUI Open WebUI SSRF Vulnerability CVE-2026-70479 via Playwright

    Patch now · Disclosed · since 4 Aug 2026 · CVE-2026-70479

    AI
  3. closed3.1
    Open WebUI Open WebUI Vulnerability CVE-2026-70483 Enables Chat Task Abortions

    Patch now · Disclosed · since 4 Aug 2026 · CVE-2026-70483

    AI
  4. closed4.1
    Open WebUI Open WebUI Vulnerability CVE-2026-70480 Allows Outbound Requests

    Patch now · Disclosed · since 4 Aug 2026 · CVE-2026-70480

    AI
  5. closed8.7
    Open WebUI CVE-2026-70492: Open WebUI stored XSS vulnerability in math block rendering

    Patch now · Disclosed · since 4 Aug 2026 · CVE-2026-70492

    AI
  6. closed5.3
    Open WebUI CVE-2026-70487: Open WebUI unauthorized knowledge file access vulnerability

    Patch now · Disclosed · since 4 Aug 2026 · CVE-2026-70487

    AI