Mistune is a Python Markdown parser with renderers and plugins.

Code

The project this record applies to. Exploit listings stay in References.

• Repository · github.com

Timeline

Detection, updates, and resolution for this record.

1. May 26, 2026 · NIST NVD

   Detected

   Mistune is a Python Markdown parser with renderers and plugins. In 3.2.0 and earlier, in src/mistune/directives/image.py, the render_figure() function concatenates figclass and figwidth options directly into HTML attributes without escaping. This allows attribute injection and XSS even when HTMLRenderer(escape=True) is used, because these values bypass the inline renderer. Version 3.2.1 contains a

2. Jul 24, 2026 · NIST NVD

   Updated

   Mistune is a Python Markdown parser with renderers and plugins. In 3.2.0 and earlier, in src/mistune/directives/image.py, the render_figure() function concatenates figclass and figwidth options directly into HTML attributes without escaping. This allows attribute injection and XSS even when HTMLRenderer(escape=True) is used, because these values bypass the inline renderer. Version 3.2.1 contains a

Affected

• cpe mistune project/mistuneversion unspecified

Sources

• CVE.orgVulnerability recordCVE-2026-44896

  Official CVE identifier

  cve.org
• NIST NVDVulnerability recordCVE-2026-44896

  Mistune is a Python Markdown parser with renderers and plugins. In 3.2.0 and earlier, in src/mistune/directives/image.py, the render_figure() function concatenates figclass and figwidth options directly into HTML attributes without escaping. This allows attribute injection and XS

  nvd.nist.gov

References

• Reference · github.com
• Vendor Advisory · github.com