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CVE-2026-65898

CVE-2026-65898 · DOMPurify before 3.4.11 Permanent Attribute Allowlist Pollution via setConfig

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

DOMPurify before 3.4.11 fails to clone the ALLOWED_ATTR allowlist when setConfig() is used with an uponSanitizeAttribute hook, allowing the hook to permanently mutate the shared allowlist. Attackers can register a hook that conditionally allows dangerous attributes like onerror for trusted elements, then submit untrusted content that inherits the polluted allowlist and executes event handlers as stored XSS.

CVSS 5.1 · Medium · EPSS 0.2% · Fix available

Published
Updated

Stack: system · node

Affected products and versions

  • dompurify

    Versions
    • ≥ 0, < 3.4.11: Affected (semver)
    • 3.4.11: Not affected (semver)

    Update to 3.4.11

  • node-dompurify Debian:12

    Versions
    • 2.4.1+dfsg+~2.4.0-1
    • 2.4.1+dfsg+~2.4.0-2
    • 2.4.1+dfsg+~2.4.0-2+deb12u1
    • 3.0.9+dfsg+~3.0.5-1
    • 3.1.6+dfsg+~3.0.5-1
    • 3.1.7+dfsg+~3.0.5-1
    • 3.1.7+dfsg+~3.0.5-2
    • 3.2.5+dfsg-1
    • 3.3.2+dfsg-1
    • 3.3.3+dfsg-1
    • 3.3.3+dfsg-2
    • 3.4.1+dfsg-1
    • 3.4.12+dfsg-1
    • 3.4.13+dfsg-1
    • 3.4.13+dfsg-2
    • 3.4.16+dfsg-1
    • 3.4.2+dfsg-1
    • 3.4.5+dfsg-1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • node-dompurify Debian:13

    Versions
    • 3.1.7+dfsg+~3.0.5-2
    • 3.2.5+dfsg-1
    • 3.3.2+dfsg-1
    • 3.3.3+dfsg-1
    • 3.3.3+dfsg-2
    • 3.4.1+dfsg-1
    • 3.4.12+dfsg-1
    • 3.4.13+dfsg-1
    • 3.4.13+dfsg-2
    • 3.4.16+dfsg-1
    • 3.4.2+dfsg-1
    • 3.4.5+dfsg-1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • node-dompurify Debian:14

    Versions
    • 3.1.7+dfsg+~3.0.5-2
    • 3.2.5+dfsg-1
    • 3.3.2+dfsg-1
    • 3.3.3+dfsg-1
    • 3.3.3+dfsg-2
    • 3.4.1+dfsg-1
    • 3.4.2+dfsg-1
    • 3.4.5+dfsg-1
    Affected ranges
    • ECOSYSTEM: < 3.4.12+dfsg-1

    Update to 3.4.12+dfsg-1

  • dompurify npm

    Affected ranges
    • SEMVER: < 3.4.11

    Update to 3.4.11

  • node-dompurify Ubuntu:22.04:LTS

    Versions
    • 2.3.0+dfsg-2
    • 2.3.3+dfsg-1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • node-dompurify Ubuntu:24.04:LTS

    Versions
    • 2.4.1+dfsg+~2.4.0-1
    • 3.0.9+dfsg+~3.0.5-1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • node-dompurify Ubuntu:26.04:LTS

    Versions
    • 3.1.7+dfsg+~3.0.5-2
    • 3.3.3+dfsg-1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

Original sources

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