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CVE-2020-6817

CVE-2020-6817

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

bleach.clean behavior parsing style attributes could result in a regular expression denial of service (ReDoS). Calls to bleach.clean with an allowed tag with an allowed style attribute are vulnerable to ReDoS. For example, bleach.clean(..., attributes={'a': ['style']}).

CVSS 7.5 · High · EPSS 0.7% · Fix available

Published
Updated

Stack: system · python

Affected products and versions

  • mozilla bleach

    Versions
    • ≥ unspecified, < 3.1.4: Affected (custom)

    Update to 3.1.4

  • python-bleach Debian:12

    Affected ranges
    • ECOSYSTEM: < 3.1.4-1

    Update to 3.1.4-1

  • python-bleach Debian:13

    Affected ranges
    • ECOSYSTEM: < 3.1.4-1

    Update to 3.1.4-1

  • python-bleach Debian:14

    Affected ranges
    • ECOSYSTEM: < 3.1.4-1

    Update to 3.1.4-1

  • bleach PyPI

    Versions
    • 0.1
    • 0.1.1
    • 0.1.2
    • 0.2
    • 0.2.1
    • 0.2.2
    • 0.3
    • 0.3.1
    • 0.3.3
    • 0.3.4
    • 0.5.0
    • 0.5.1
    • 1.0.0
    • 1.0.1
    • 1.0.2
    • 1.0.3
    • 1.0.4
    • 1.1.0
    • 1.1.1
    • 1.1.2
    • 1.1.3
    • 1.1.4
    • 1.1.5
    • 1.2
    • 1.2.1
    • 1.2.2
    • 1.4
    • 1.4.1
    • 1.4.2
    • 1.4.3
    • 1.5.0
    • 2.0.0
    • 2.1
    • 2.1.1
    • 2.1.2
    • 2.1.3
    • 2.1.4
    • 3.0.0
    • 3.0.1
    • 3.0.2
    • 3.1.0
    • 3.1.1
    • 3.1.2
    • 3.1.3
    Affected ranges
    • ECOSYSTEM: < 3.1.4

    Update to 3.1.4

  • python-bleach Ubuntu:Pro:16.04:LTS

    Versions
    • 1.4-1
    • 1.4.2-1
    Affected ranges
    • ECOSYSTEM: < 1.4.2-1ubuntu0.1~esm1

    Update to 1.4.2-1ubuntu0.1~esm1

  • python-bleach Ubuntu:Pro:18.04:LTS

    Versions
    • 2.0-1
    • 2.1.2-1
    Affected ranges
    • ECOSYSTEM: < 2.1.2-1ubuntu0.1~esm1

    Update to 2.1.2-1ubuntu0.1~esm1

  • python-bleach Ubuntu:Pro:20.04:LTS

    Versions
    • 3.1.0-1
    • 3.1.0-2
    • 3.1.1-1
    Affected ranges
    • ECOSYSTEM: < 3.1.1-1ubuntu0.1~esm1

    Update to 3.1.1-1ubuntu0.1~esm1

Original sources

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