DEBIAN-CVE-2026-86435

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    DEBIAN-CVE-2026-86435

    Published: 7 Sept 2026Last Modified: 10 Sept 2026
    Upstream:
    CVE-2026-86435

    Summary:

    Details: commonmark versions from 1.5.0 before 2.8.4 contain a denial of service vulnerability in the Footnote extension that fails to deduplicate footnote definitions. Attackers can craft documents with duplicate footnote definitions and references to create quadratic output expansion, consuming excessive memory and CPU to exhaust server resources.

    References: https://security-tracker.debian.org/tracker/CVE-2026-86435

    Affected packages

    Package

    Name: php-league-commonmark

    Purl: pkg:deb/debian/php-league-commonmark?arch=source&distro=bookworm

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -None

    Affected versions

    2.10.0-1

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High
    DEBIAN-CVE-2026-86435 | CVE-DB