Medium severity6.1NVD Advisory· Published May 6, 2024· Updated Jun 17, 2026

CVE-2024-34078

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.

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

Affected packages

Versions sourced from the GitHub Security Advisory.

Package	Affected versions	Patched versions
html-sanitizerPyPI	< 2.4.2	2.4.2

Affected products

ghsa-coords
pkg:pypi/html-sanitizer
Range: < 2.4.2

Patches

Vulnerability mechanics

References

github.com/advisories/GHSA-wvhx-q427-fgh3ghsaADVISORY
github.com/matthiask/html-sanitizer/commit/48db42fc5143d0140c32d929c46b802f96913550nvdWEB
github.com/matthiask/html-sanitizer/security/advisories/GHSA-wvhx-q427-fgh3nvdWEB
lists.debian.org/debian-lts-announce/2024/08/msg00000.htmlnvd

News mentions

No linked articles in our index yet.

cvss	0.397
epss	0.000
exploit	0.000
kev	0.000
patch	-0.070
ransomware	0.000