CVE-2024-34078

Published: May 6, 2024Modified: Jun 17, 2026Deferred

6.1

Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Exploitability: 2.8 / Impact: 2.7

Source: security-advisories@github.com (Secondary)

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.

Related CWEs

CWE-79

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.

References (5)

https://github.com/matthiask/html-sanitizer/commit/48db42fc5143d0140c32d929c46b802f96913550

Source: security-advisories@github.com

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

Source: security-advisories@github.com

https://github.com/matthiask/html-sanitizer/commit/48db42fc5143d0140c32d929c46b802f96913550

Source: af854a3a-2127-422b-91ae-364da2661108

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

Source: af854a3a-2127-422b-91ae-364da2661108

https://lists.debian.org/debian-lts-announce/2024/08/msg00000.html

Source: af854a3a-2127-422b-91ae-364da2661108

Timeline

No history available yet.