# CVE-2025-23207: fonts-katex: KaTeX is a fast, easy-to-use JavaScript library for TeX math rendering onthe web

CVE-2025-23207 is fixed in 4 products on 1 platform, first by fonts-katex 0.13.11+~cs6.0.0-2ubuntu0.1~esm1, released January 17, 2025. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2025-23207
- Priority: High
- CVSS: 7.2 (Medium)
- EPSS: 0.0041
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Jan 17, 2025

## Description

KaTeX is a fast, easy-to-use JavaScript library for TeX math rendering onthe web. KaTeX users who render untrusted mathematical expressions with`renderToString` could encounter malicious input using `\htmlData` thatruns arbitrary JavaScript, or generate invalid HTML. Users are advised toupgrade to KaTeX v0.16.21 to remove this vulnerability. Users unable toupgrade should avoid use of or turn off the `trust` option, or set it toforbid `\htmlData` commands, forbid inputs containing the substring`"\\htmlData"` and sanitize HTML output from KaTeX.

## 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 | fonts-katex Ubuntu 24.04.5 LTS (noble) | 0.16.10+~cs6.1.0-2ubuntu0.24.04.1~esm1 | [fonts-katex 0.16.10+~cs6.1.0-2ubuntu0.24.04.1~esm1](https://patchblox.com/security/data/fix/linux/ubuntu-noble-fonts-katex-0.16.10-cs6.1.0-2ubuntu0.24.04.1-esm1.md) | Jan 17, 2025 |
| Linux | fonts-katex Ubuntu 24.10 (oracular) | 0.16.10+~cs6.1.0-2ubuntu0.24.10.1 | [fonts-katex 0.16.10+~cs6.1.0-2ubuntu0.24.10.1](https://patchblox.com/security/data/fix/linux/ubuntu-oracular-fonts-katex-0.16.10-cs6.1.0-2ubuntu0.24.10.1.md) | Jan 16, 2026 |
| Linux | fonts-katex Ubuntu 25.04 (plucky) | 0.16.10+~cs6.1.0-2ubuntu0.25.04.1 | [fonts-katex 0.16.10+~cs6.1.0-2ubuntu0.25.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-plucky-fonts-katex-0.16.10-cs6.1.0-2ubuntu0.25.04.1.md) | Jan 16, 2026 |
| Linux | fonts-katex Ubuntu 25.10 (questing) | 0.16.10+~cs6.1.0-2ubuntu1 | [fonts-katex 0.16.10+~cs6.1.0-2ubuntu1](https://patchblox.com/security/data/fix/linux/ubuntu-questing-fonts-katex-0.16.10-cs6.1.0-2ubuntu1.md) | Jan 17, 2025 |
| Linux | fonts-katex Ubuntu 26.04.1 LTS (resolute) | 0.16.10+~cs6.1.0-2ubuntu1 | [fonts-katex 0.16.10+~cs6.1.0-2ubuntu1](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-fonts-katex-0.16.10-cs6.1.0-2ubuntu1.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 | katex Ubuntu 24.04.5 LTS (noble) | 0.16.10+~cs6.1.0-2ubuntu0.24.04.1~esm1 | [katex 0.16.10+~cs6.1.0-2ubuntu0.24.04.1~esm1](https://patchblox.com/security/data/fix/linux/ubuntu-noble-katex-0.16.10-cs6.1.0-2ubuntu0.24.04.1-esm1.md) | Jan 17, 2025 |
| Linux | katex Ubuntu 24.10 (oracular) | 0.16.10+~cs6.1.0-2ubuntu0.24.10.1 | [katex 0.16.10+~cs6.1.0-2ubuntu0.24.10.1](https://patchblox.com/security/data/fix/linux/ubuntu-oracular-katex-0.16.10-cs6.1.0-2ubuntu0.24.10.1.md) | Jan 16, 2026 |
| Linux | katex Ubuntu 25.04 (plucky) | 0.16.10+~cs6.1.0-2ubuntu0.25.04.1 | [katex 0.16.10+~cs6.1.0-2ubuntu0.25.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-plucky-katex-0.16.10-cs6.1.0-2ubuntu0.25.04.1.md) | Jan 16, 2026 |
| Linux | katex Ubuntu 25.10 (questing) | 0.16.10+~cs6.1.0-2ubuntu1 | [katex 0.16.10+~cs6.1.0-2ubuntu1](https://patchblox.com/security/data/fix/linux/ubuntu-questing-katex-0.16.10-cs6.1.0-2ubuntu1.md) | Jan 17, 2025 |
| Linux | katex Ubuntu 26.04.1 LTS (resolute) | 0.16.10+~cs6.1.0-2ubuntu1 | [katex 0.16.10+~cs6.1.0-2ubuntu1](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-katex-0.16.10-cs6.1.0-2ubuntu1.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 | libjs-katex Ubuntu 24.04.5 LTS (noble) | 0.16.10+~cs6.1.0-2ubuntu0.24.04.1~esm1 | [libjs-katex 0.16.10+~cs6.1.0-2ubuntu0.24.04.1~esm1](https://patchblox.com/security/data/fix/linux/ubuntu-noble-libjs-katex-0.16.10-cs6.1.0-2ubuntu0.24.04.1-esm1.md) | Jan 17, 2025 |
| Linux | libjs-katex Ubuntu 24.10 (oracular) | 0.16.10+~cs6.1.0-2ubuntu0.24.10.1 | [libjs-katex 0.16.10+~cs6.1.0-2ubuntu0.24.10.1](https://patchblox.com/security/data/fix/linux/ubuntu-oracular-libjs-katex-0.16.10-cs6.1.0-2ubuntu0.24.10.1.md) | Jan 16, 2026 |
| Linux | libjs-katex Ubuntu 25.04 (plucky) | 0.16.10+~cs6.1.0-2ubuntu0.25.04.1 | [libjs-katex 0.16.10+~cs6.1.0-2ubuntu0.25.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-plucky-libjs-katex-0.16.10-cs6.1.0-2ubuntu0.25.04.1.md) | Jan 16, 2026 |
| Linux | libjs-katex Ubuntu 25.10 (questing) | 0.16.10+~cs6.1.0-2ubuntu1 | [libjs-katex 0.16.10+~cs6.1.0-2ubuntu1](https://patchblox.com/security/data/fix/linux/ubuntu-questing-libjs-katex-0.16.10-cs6.1.0-2ubuntu1.md) | Jan 17, 2025 |
| Linux | libjs-katex Ubuntu 26.04.1 LTS (resolute) | 0.16.10+~cs6.1.0-2ubuntu1 | [libjs-katex 0.16.10+~cs6.1.0-2ubuntu1](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-libjs-katex-0.16.10-cs6.1.0-2ubuntu1.md) | Jan 17, 2025 |
| Linux | node-katex Debian 14 | 0.16.10+~cs6.1.0-7 | [DEBIAN-CVE-2025-23207](https://patchblox.com/security/data/fix/linux/debian-cve-2025-23207.md) | Jan 17, 2025 |

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Data as of 2026-11-09T13:31:49Z 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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