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CVE-2026-44896

Mistune: XSS via unescaped figclass/figwidth in Figure directive PUBLISHED

Description (CNA)

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 patch.

Affected (CNA)

Vendor / productVersions
lepture / mistuneaffected < 3.2.1

CWE

CWE-79

References

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.