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CVE-2021-26813

CVE-2021-26813

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

markdown2 >=1.0.1.18, fixed in 2.4.0, is affected by a regular expression denial of service vulnerability. If an attacker provides a malicious string, it can make markdown2 processing difficult or delayed for an extended period of time.

CVSS 7.5 · High · EPSS 2.3% · Fix available

Published
Updated

Stack: system · python

Affected products and versions

  • n/a

    Versions
    • n/a: Affected

    No fix published

  • python-markdown2 Debian:12

    Affected ranges
    • ECOSYSTEM: < 2.3.10-1.1

    Update to 2.3.10-1.1

  • python-markdown2 Debian:13

    Affected ranges
    • ECOSYSTEM: < 2.3.10-1.1

    Update to 2.3.10-1.1

  • python-markdown2 Debian:14

    Affected ranges
    • ECOSYSTEM: < 2.3.10-1.1

    Update to 2.3.10-1.1

  • markdown2 PyPI

    Versions
    • 1.0.1.18
    • 1.0.1.19
    • 1.1.0
    • 1.1.1
    • 1.2.0
    • 1.3.0
    • 1.3.1
    • 1.4.0
    • 1.4.1
    • 1.4.2
    • 2.0.0
    • 2.0.1
    • 2.1.0
    • 2.2.0
    • 2.2.1
    • 2.2.2
    • 2.2.3
    • 2.3.0
    • 2.3.1
    • 2.3.10
    • 2.3.2
    • 2.3.3
    • 2.3.4
    • 2.3.5
    • 2.3.6
    • 2.3.7
    • 2.3.8
    • 2.3.9
    Affected ranges
    • ECOSYSTEM: ≥ 1.0.1.18, < 2.4.0

    Update to 2.4.0

  • markdown2 PyPI

    Versions
    • 1.0.1.18
    • 1.0.1.19
    • 1.1.0
    • 1.1.1
    • 1.2.0
    • 1.3.0
    • 1.3.1
    • 1.4.0
    • 1.4.1
    • 1.4.2
    • 2.0.0
    • 2.0.1
    • 2.1.0
    • 2.2.0
    • 2.2.1
    • 2.2.2
    • 2.2.3
    • 2.3.0
    • 2.3.1
    • 2.3.2
    • 2.3.3
    • 2.3.4
    • 2.3.5
    • 2.3.6
    • 2.3.7
    • 2.3.8
    • 2.3.9
    • 2.3.10
    Affected ranges
    • ECOSYSTEM: ≥ 1.0.1.18, < 2.4.0

    Update to 2.4.0

  • python-markdown2 Ubuntu:20.04:LTS

    Versions
    • 2.3.7-2
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • python-markdown2 Ubuntu:22.04:LTS

    Versions
    • 2.3.10-1.1
    • 2.4.1-1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • python-markdown2 Ubuntu:24.04:LTS

    Versions
    • 2.4.1-1
    • 2.4.11-1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • python-markdown2 Ubuntu:25.10

    Versions
    • 2.4.11-1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • python-markdown2 Ubuntu:26.10

    Versions
    • 2.5.4-3
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • python-markdown2 Ubuntu:26.04:LTS

    Versions
    • 2.4.11-1
    • 2.5.4-2
    • 2.5.4-3
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

Original sources

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