# CVE-2024-28243: node-katex: KaTeX is a JavaScript library for TeX math rendering on the web

CVE-2024-28243 is fixed in 4 products on 1 platform, first by DEBIAN-CVE-2024-28243, released March 25, 2024. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2024-28243
- Priority: Routine
- CVSS: 6.5 (medium)
- EPSS: 0.0141
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Mar 25, 2024

## Description

KaTeX is a JavaScript library for TeX math rendering on the web. KaTeX users who render untrusted mathematical expressions could encounter malicious input using `\edef` that causes a near-infinite loop, despite setting `maxExpand` to avoid such loops. This can be used as an availability attack, where e.g. a client rendering another user's KaTeX input will be unable to use the site due to memory overflow, tying up the main thread, or stack overflow. Upgrade to KaTeX v0.16.10 to remove this vulnerability.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | fonts-katex Ubuntu 22.04.1 LTS (jammy) | 0.13.11+~cs6.0.0-2ubuntu0.1~esm1 | [fonts-katex 0.13.11+~cs6.0.0-2ubuntu0.1~esm1](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-fonts-katex-0.13.11-cs6.0.0-2ubuntu0.1-esm1.md) | Jan 17, 2025 |
| Linux | katex Ubuntu 22.04.1 LTS (jammy) | 0.13.11+~cs6.0.0-2ubuntu0.1~esm1 | [katex 0.13.11+~cs6.0.0-2ubuntu0.1~esm1](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-katex-0.13.11-cs6.0.0-2ubuntu0.1-esm1.md) | Jan 17, 2025 |
| Linux | libjs-katex Ubuntu 22.04.1 LTS (jammy) | 0.13.11+~cs6.0.0-2ubuntu0.1~esm1 | [libjs-katex 0.13.11+~cs6.0.0-2ubuntu0.1~esm1](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-libjs-katex-0.13.11-cs6.0.0-2ubuntu0.1-esm1.md) | Jan 17, 2025 |
| Linux | node-katex Debian 13.5 (trixie) | 0.16.10+~cs6.1.0-1 | [DEBIAN-CVE-2024-28243](https://patchblox.com/security/data/fix/linux/debian-cve-2024-28243.md) | Mar 25, 2024 |
| Linux | node-katex Debian 14 | 0.16.10+~cs6.1.0-1 | [DEBIAN-CVE-2024-28243](https://patchblox.com/security/data/fix/linux/debian-cve-2024-28243.md) | Mar 25, 2024 |

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Data as of 2026-11-08T00:53:09Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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