Hi,

The following vulnerability was published for node-katex.

CVE-2026-103923[0]:
| KaTeX is a fast, easy-to-use JavaScript library for TeX math
| rendering on the web. From 0.11.0 until 0.18.2, KaTeX uses ordinary
| JavaScript property access for the renderer options object, the
| trust setting, default and processor setting metadata, and namespace
| lookup and group restoration, allowing inherited properties to be
| treated as explicitly supplied values. When Object.prototype is
| already polluted or an attacker controls the options object's
| prototype, attacker-controlled mathematical expressions can use an
| inherited trust value to enable trusted rendering and produce links
| capable of user-interaction cross-site scripting or loading
| attacker-selected external resources in a consuming application that
| inserts unsanitized KaTeX output into a page. KaTeX does not itself
| create the prototype pollution, and rendering an expression alone
| does not execute script. This issue is fixed in version 0.18.2.


If you fix the vulnerability please also make sure to include the
CVE (Common Vulnerabilities & Exposures) id in your changelog entry.

For further information see:

[0] https://security-tracker.debian.org/tracker/CVE-2026-103923
https://www.cve.org/CVERecord?id=CVE-2026-103923
[1] https://github.com/KaTeX/KaTeX/security/advisories/GHSA-238p-pmpm-9mq7
[2] https://github.com/KaTeX/KaTeX/pull/4260
[3] https://github.com/KaTeX/KaTeX/commit/0adf7e77db6915d991803b29699f82b1ccf8d4f4

Please adjust the affected versions in the BTS as needed.

Regards,
Salvatore

Hello,

Bug #1149653 in node-katex reported by you has been fixed in the
Git repository and is awaiting an upload. You can see the commit
message below and you can check the diff of the fix at:

https://salsa.debian.org/js-team/node-katex/-/commit/a4d633fee76bb4506cca0f59dbb09980260ecf65

(this message was generated automatically)
-- 
Greetings

https://bugs.debian.org/1149653

We believe that the bug you reported is fixed in the latest version of
node-katex, which is due to be installed in the Debian FTP archive.

A summary of the changes between this version and the previous one is
attached.

Thank you for reporting the bug, which will now be closed.  If you
have further comments please address them to 1149653@bugs.debian.org,
and the maintainer will reopen the bug report if appropriate.

Debian distribution maintenance software
pp.
Xavier Guimard <yadd@debian.org> (supplier of updated node-katex package)

(This message was generated automatically at their request; if you
believe that there is a problem with it please contact the archive
administrators by mailing ftpmaster@ftp-master.debian.org)
Format: 1.8
Date: Sat, 03 Oct 2026 08:53:42 +0200
Source: node-katex
Architecture: source
Version: 0.16.10+~cs6.1.0-10
Distribution: unstable
Urgency: medium
Maintainer: Debian Javascript Maintainers <pkg-javascript-devel@lists.alioth.debian.org>
Changed-By: Xavier Guimard <yadd@debian.org>
Closes: 1149653
Changes:
 node-katex (0.16.10+~cs6.1.0-10) unstable; urgency=medium
 .
   * Team upload
   * Prevent prototype pollution in settings, namespace lookup and group
     restoration (Closes: #1149653, CVE-2026-103923)
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