🛡️ CVE-2024-34078 on Debian — python-html-sanitizer

⚪ Unknown ✅ No Known Exploit OSV

N/A

CVSS Score

0 Low4 Medium7 High9 Critical10

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.

Distribution advisory

This page covers CVE-2024-34078 as tracked by Debian, for the package python-html-sanitizer. The fix is available in version 1.9.1-2+deb11u1; earlier versions remain affected.

How this vulnerability can be exploited

This issue can be reached over the network, attack complexity is low, an attacker needs no privileges on the target. A user must be tricked into taking some action. The scope is changed, meaning a successful attack can affect components beyond the vulnerable one. Rated impact: confidentiality low, integrity low, availability none.

Affected software

DEBIAN-CVE-2024-34078 is recorded against 1 package.

python-html-sanitizer (fixed in 1.9.1-2+deb11u1)

Timeline and source

Published on 6 May 2024 and last revised on 4 August 2026. No public exploit is currently recorded for this entry. Record sourced from OSV.

References

security-tracker.debian.org (Advisory)

CVE-2024-34078 on other distributions

Each distribution ships its own build and its own fixed version. Pick the one you run:

Base record Ubuntu

Details

Severity Unknown

CVSS Score N/A

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

CWE N/A

Public Exploit ✅ No

Source OSV

Published 2024-05-06

Updated 2026-08-11

Modified 2026-08-04

Fix URL N/A

Affected Packages

Software	From version	Fixed in
python-html-sanitizer	—	1.9.1-2+deb11u1

References

ADVISORY https://security-tracker.debian.org/tracker/CVE-2024-34078

🔗 NVD 🔗 Mitre

Similar Threats

Unknown DLA-3856-1
Unknown UBUNTU-CVE-2024-34078

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