CVE-2024-34078 Information

Description

html-sanitizer is an allowlist-based HTML cleaner. If using keep_typographic_whitespace=False (which is the default) the sanitizer normalizes unicode to the NFKC form at the end. Some unicode characters normalize to chevrons; this allows specially crafted HTML to escape sanitization. The problem has been fixed in 2.4.2.

Reference

https://github.com/matthiask/html-sanitizer/security/advisories/GHSA-wvhx-q427-fgh3 https://github.com/matthiask/html-sanitizer/commit/48db42fc5143d0140c32d929c46b802f96913550