Open WebUI before 0.11.4 Stored XSS via javascript: URLs in Markdown Links
Open WebUI before 0.11.4 contains a stored cross-site scripting vulnerability in MarkdownInlineTokens.svelte, which renders markdown link URLs into anchor hrefs without validating their scheme. Authenticated users can embed javascript: links in shared chats that, when clicked by a victim, steal the victim's JWT from local storage, including admins' tokens.
CVE-2026-109288
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-109288
open-webui
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"vendor": "open-webui",
"product": "open-webui",
"versions": [
{
"status": "affected",
"version": "0",
"lessThan": "0.11.4",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "0.11.4",
"versionType": "semver"
}
],
"packageURL": "pkg:pypi/open-webui",
"defaultStatus": "unaffected"
}
]- Related CVEs
- CVE-2026-109288
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #53309 · Revision 1
- Added to Heist Feed
- Publisher date