KaTeX missing normalization of the protocol in URLs allows bypassing forbidden protocols

Description

Code that uses KaTeX’s trust option, specifically that provides a function to block-list certain URL protocols, can be fooled by URLs in malicious inputs that use uppercase characters in the protocol.

Recommendation

Update the katex package to the latest compatible version. Followings are version details:

• Affected version(s): >= 0.11.0, < 0.16.10
• Patched version(s): 0.16.10

References

• GHSA-3wc5-fcw2-2329
• CVE-2024-28246
• CWE-184
• CAPEC-310
• OWASP 2021-A3
• OWASP 2021-A6

Related Issues

• KaTeX \htmlData does not validate attribute names - CVE-2025-23207
• Elliptic's private key extraction in ECDSA upon signing a malformed input (e.g. a string) - Vulnerability
• KaTeX's `\includegraphics` does not escape filename - CVE-2024-28245
• KaTeX's maxExpand bypassed by Unicode sub/superscripts - CVE-2024-28244

Tags:

npm

katex