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CVE-2026-114605

CVE-2026-114605 · dnspython dns.name.from_wire_parser() excessive CPU use

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

dnspython is a DNS toolkit for Python. Prior to 2.9.0, dns.name.from_wire_parser follows attacker-controlled DNS compression pointer chains without a hop limit. A malicious DNS wire-format message can force excessive pointer traversal during name decompression, causing high CPU use, application degradation, or denial of service in applications that process untrusted DNS messages. This issue is fixed in version 2.9.0.

CVSS 7.5 · High · EPSS 0.3%

Published
Updated

Stack: system

Affected products and versions

  • dnspython

    Versions
    • < 2.9.0: Affected

    No fix published

  • dnspython Debian:12

    Versions
    • 2.3.0-1
    • 2.4.0-1
    • 2.4.0~rc1-1
    • 2.4.1-1
    • 2.4.2-1
    • 2.5.0-1
    • 2.5.0~rc1-1
    • 2.6.0-1
    • 2.6.0~rc1-1
    • 2.6.1-1
    • 2.7.0-1
    • 2.7.0~rc1-1
    • 2.8.0-1
    • 2.8.0-2
    • 2.8.0-3
    • 2.8.0-4
    • 2.8.0-5
    • 2.8.0-6
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • dnspython Debian:13

    Versions
    • 2.7.0-1
    • 2.8.0-1
    • 2.8.0-2
    • 2.8.0-3
    • 2.8.0-4
    • 2.8.0-5
    • 2.8.0-6
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • dnspython Debian:14

    Versions
    • 2.7.0-1
    • 2.8.0-1
    • 2.8.0-2
    • 2.8.0-3
    • 2.8.0-4
    • 2.8.0-5
    • 2.8.0-6
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

Original sources

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