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CVE-2024-34078

CVE-2024-34078 · html-sanitizer allows arbitrary HTML present after sanitization because of unicode normalization

This page contains facts from public vulnerability sources. Check the original advisory before updating.

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.

CVSS 6.1 · Medium · EPSS 0.6% · Fix available

Published
Updated

Stack: system · python

Affected products and versions

  • html-sanitizer

    Versions
    • < 2.4.2: Affected

    No fix published

  • python-html-sanitizer Debian:11

    Versions
    • 1.9.1-2
    Affected ranges
    • ECOSYSTEM: < 1.9.1-2+deb11u1

    Update to 1.9.1-2+deb11u1

  • html-sanitizer PyPI

    Versions
    • 1.0.0
    • 1.1.0
    • 1.1.1
    • 1.1.2
    • 1.1.3
    • 1.1.4
    • 1.2.0
    • 1.2.1
    • 1.3.0
    • 1.4.0
    • 1.5.0
    • 1.6.0
    • 1.6.1
    • 1.6.2
    • 1.6.3
    • 1.6.4
    • 1.7.0
    • 1.7.1
    • 1.7.2
    • 1.7.3
    • 1.8.0
    • 1.9.0
    • 1.9.1
    • 1.9.2
    • 1.9.3
    • 2.0.0
    • 2.1.0
    • 2.2.0
    • 2.3.0
    • 2.3.1
    • 2.4.0
    • 2.4.1
    Affected ranges
    • ECOSYSTEM: < 2.4.2

    Update to 2.4.2

  • python-html-sanitizer Ubuntu:22.04:LTS

    Versions
    • 1.9.1-2
    • 1.9.3-1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • python-html-sanitizer Ubuntu:24.04:LTS

    Versions
    • 2.2-1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

Original sources

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