Mistune before 3.3.0 Stored XSS via Include Directive HTML Files
Mistune before 3.3.0 contains a cross-site scripting vulnerability in the Include directive that emits included .html, .xhtml, or .htm file content as raw block_html tokens. Attackers who can plant an HTML file readable by the renderer can reference it via an include directive, combined with path traversal, to execute stored scripts when escape=False is set.
CVE-2026-115350
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-2026-115350
mistune
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": "lepture",
"product": "mistune",
"versions": [
{
"status": "affected",
"version": "0",
"lessThan": "3.3.0",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "3.3.0",
"versionType": "semver"
}
],
"packageURL": "pkg:pypi/mistune",
"defaultStatus": "unaffected"
}
]- Related CVEs
- CVE-2026-115350
Source reference:
/cveMetadata/cveId
Publisher severity
medium
Source reference: /containers/cna/metrics
- Event
- #52315 · Revision 1
- Added to Heist Feed
- Publisher date