CVE-2026-121006

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    CVE-2026-121006

    Published: 6 Nov 2026Last Modified: 8 Nov 2026

    Summary: HTTP::Body versions before 1.24_02 for Perl parse the trailer in quadratic time

    Details: HTTP::Body versions before 1.24_02 for Perl parse the trailer in quadratic time. Everything after the last chunk in the same call to add() is parsed with HTTP::Headers, which takes time quadratic in the number of fields of one name. For example, it takes several seconds to parse 16 KiB of "a:" lines. A remote attackercan exhause the CPU with a single request. HTTP::Body version 1.25 limits the size and number of lines in the trailer.

    References: http://www.openwall.com/lists/oss-security/2026/11/06/8, https://cpan.org/modules, https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/121xxx/CVE-2026-121006.json, https://metacpan.org/release/GETTY/HTTP-Body-1.24_02/changes, https://nvd.nist.gov/vuln/detail/CVE-2026-121006, https://github.com/libwww-perl/HTTP-Body/commit/983dd4ca3b863ab513240b02c91c3114fb299389.patch, https://github.com/libwww-perl/HTTP-Body

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- 0
    Fixed -983dd4ca3b863ab513240b02c91c3114fb299389

    Affected versions

    v1.24

    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
    CVE-2026-121006 | CVE-DB