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OpenAdvisories

Package · Debian

python-markdown2

4 known vulnerabilities.

All Critical High Medium Low Exploited only

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  • High 7.5
    CVE-2026-118694

    python-markdown2 through 2.5.5 Denial of Service via Unclosed Inline Link Destinations

    python-markdown2 through 2.5.5 contains a denial of service vulnerability that allows remote users to exhaust CPU by submitting Markdown with unclosed inline link destinations. Attackers can submit repeated '[a](' or '![a](' sequences, causing _find_balanced …

    trentm python-markdown2 python-markdown2 python-markdown2 Debian Ubuntu
  • High 7.5
    CVE-2026-88753

    A Regular-Expression Denial of Service (ReDoS) in the Markdown2. extract_metadata() function (lib/markdown2.py) of tren…

    python-markdown2 python-markdown2 Debian Ubuntu
  • High 7.5
    CVE-2021-26813

    markdown2 Regular Expression Denial of Service

    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.

    markdown2 python-markdown2 python-markdown2 Debian Ubuntu PyPI