[From nobody Sat Oct  3 08:21:05 2026
Received: (at submit) by bugs.debian.org; 1 Oct 2026 21:37:29 +0000
X-Spam-Checker-Version: SpamAssassin 4.0.1-bugs.debian.org_2005_01_02
 (2024-03-25) on buxtehude.debian.org
X-Spam-Level: 
X-Spam-Status: No, score=-10.9 required=4.0 tests=BAYES_00,FOURLA,
 FROMDEVELOPER,MD5_SHA1_SUM,NO_RELAYS,XMAILER_REPORTBUG autolearn=ham
 autolearn_force=no version=4.0.1-bugs.debian.org_2005_01_02
X-Spam-Bayes: score:0.0000 Tokens: new, 25; hammy, 150; neutral, 79; spammy,
 0. spammytokens: hammytokens:0.000-+--XDebbugsCc,
 0.000-+--X-Debbugs-Cc, 0.000-+--H*F:U*carnil, 0.000-+--H*Ad:N*Bug,
 0.000-+--HTo:N*Debian
Return-path: <carnil@debian.org>
Received: via submission by buxtehude.debian.org with esmtp (Exim 4.96)
 (envelope-from <carnil@debian.org>) id 1xCOT1-001BqN-1g
 for submit@bugs.debian.org; Thu, 01 Oct 2026 21:37:29 +0000
Content-Type: text/plain; charset="us-ascii"
MIME-Version: 1.0
Content-Transfer-Encoding: 7bit
From: Salvatore Bonaccorso <carnil@debian.org>
To: Debian Bug Tracking System <submit@bugs.debian.org>
Subject: node-katex: CVE-2026-103923
Message-ID: <179089064744.1814335.5585798518390367043.reportbug@eldamar.lan>
X-Mailer: reportbug 13.2.0+nmu1
Date: Thu, 01 Oct 2026 23:37:27 +0200
Delivered-To: submit@bugs.debian.org

Source: node-katex
Version: 0.16.10+~cs6.1.0-2
Severity: important
Tags: security upstream
Forwarded: https://github.com/KaTeX/KaTeX/pull/4260
X-Debbugs-Cc: carnil@debian.org, Debian Security Team <team@security.debian.org>

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
]