CVE-2026-44708

Name	CVE-2026-44708
Description	Mistune is a Python Markdown parser with renderers and plugins. Prior to 3.2.1, the mistune math plugin renders inline math ($...$) and block math ($$...$$) by concatenating the raw user-supplied content directly into the HTML output without any HTML escaping. This occurs even when the parser is explicitly created with escape=True, which is supposed to guarantee that all user-controlled text is sanitised before reaching the DOM. This vulnerability is fixed in 3.2.1.
Source	CVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
Debian Bugs	1138260

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
mistune (PTS)	bookworm	2.0.4-1	vulnerable
	trixie	3.1.3-1	vulnerable
	forky	3.1.4-1	vulnerable
	sid	3.4.0-1	fixed

The information below is based on the following data on fixed versions.

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
mistune	source	(unstable)	3.3.4-1			1138260

Notes

[trixie] - mistune <no-dsa> (Minor issue)
[bookworm] - mistune <no-dsa> (Minor issue)
[bullseye] - mistune <no-dsa> (Minor issue)
https://github.com/lepture/mistune/security/advisories/GHSA-8g87-j6q8-g93x
https://github.com/lepture/mistune/commit/5fa092e3053b86f16e4c49b9d3ba0b7ab63f09ab (v3.2.1)