CVE-2025-23207

Name	CVE-2025-23207
Description	KaTeX is a fast, easy-to-use JavaScript library for TeX math rendering on the web. KaTeX users who render untrusted mathematical expressions with `renderToString` could encounter malicious input using `\htmlData` that runs arbitrary JavaScript, or generate invalid HTML. Users are advised to upgrade to KaTeX v0.16.21 to remove this vulnerability. Users unable to upgrade should avoid use of or turn off the `trust` option, or set it to forbid `\htmlData` commands, forbid inputs containing the substring `"\\htmlData"` and sanitize HTML output from KaTeX.
Source	CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
Debian Bugs	1093446

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
node-katex (PTS)	bullseye	0.10.2+dfsg-8	vulnerable
	bookworm	0.16.4+~cs6.1.0-1	vulnerable
	sid, trixie	0.16.10+~cs6.1.0-2	vulnerable

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

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
node-katex	source	(unstable)	(unfixed)			1093446

Notes

[bookworm] - node-katex <no-dsa> (Minor issue)
[bullseye] - node-katex <postponed> (Minor issue; can be fixed in next update)
https://github.com/KaTeX/KaTeX/security/advisories/GHSA-cg87-wmx4-v546
https://github.com/KaTeX/KaTeX/commit/ff289955e81aab89086eef09254cbf88573d415c (v0.16.21)