CVEvulnerability
CVE-2026-59923
6.1 MEDIUM
Official page ↗
- Status
- Analyzed
- Published
- 2026-07-08
- Last modified
- 2026-10-25
- Assigner
- [email protected]
- CVSS 3.1 ([email protected])
- 6.1 MEDIUM — CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
- Weaknesses
- CWE-79
Description
Mistune is a Python Markdown parser with renderers and plugins. Prior to 3.3.0, HTMLRenderer.safe_url() does not block percent-encoded javascript URIs, allowing attacker-supplied Markdown links or images to bypass URL protections and execute script in rendered HTML. This issue is fixed in version 3.3.0.
Affected configurations
• mistune project mistune (< 3.3.0)
Related
Weakness · CWE (1)
- CWE-79 Improper Neutralization of Input During Web Page Generation weakness
References
- https://github.com/lepture/mistune/commit/c7101fcbb6e8790e8e39157c5ca2238fc6dd6cbc Patch
- https://github.com/lepture/mistune/releases/tag/v3.3.0 Release Notes
- https://github.com/lepture/mistune/security/advisories/GHSA-8c25-4j27-2rv3 Exploit, Vendor Advisory
- https://github.com/lepture/mistune/security/advisories/GHSA-8c25-4j27-2rv3 Exploit, Vendor Advisory