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CVE-2026-115775

CVE-2026-115775 · Twisted: Unauthenticated Remote Denial of Service in the Twisted words domish XML Element Stream via an Unbounded Element Tree

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

Twisted is an event-based framework for internet applications, supporting Python 3.6+. Prior to 26.10.0rc1, the twisted.words.xish.domish ExpatElementStream parser allows an unauthenticated remote peer to keep a container element open while continuously adding child elements. The parser retains the unfinished stanza as an in-memory tree without a byte or element-count limit, and XMPP pre-authentication stream parsing exposes this behavior before credentials are accepted. A single connection can therefore exhaust server memory and terminate the process. This issue is fixed in version 26.10.0rc1.

CVSS 8.7 · High · EPSS 0.4% · Public exploit · Fix available

Published
Updated

Stack: system · python

Affected products and versions

  • twisted

    Versions
    • < 26.10.0rc1: Affected

    No fix published

  • twisted Debian:12

    Versions
    • 22.4.0-4
    • 22.4.0-4+deb12u1
    • 23.10.0-1
    • 23.10.0-2
    • 24.10.0-1
    • 24.10.0-2
    • 24.11.0-1
    • 24.3.0-1
    • 24.3.0-2
    • 24.3.0-3
    • 24.7.0-1
    • 24.7.0-2
    • 24.7.0-3
    • 25.5.0-1
    • 25.5.0-2
    • 25.5.0-3
    • 25.5.0-4
    • 25.5.0-5
    • 26.4.0-1
    • 26.4.0-2
    • 26.4.0-3
    • 26.4.0-4
    • 26.4.0-5
    • 26.4.0-6
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • twisted Debian:13

    Versions
    • 24.11.0-1
    • 25.5.0-1
    • 25.5.0-2
    • 25.5.0-3
    • 25.5.0-4
    • 25.5.0-5
    • 26.4.0-1
    • 26.4.0-2
    • 26.4.0-3
    • 26.4.0-4
    • 26.4.0-5
    • 26.4.0-6
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • twisted Debian:14

    Versions
    • 24.11.0-1
    • 25.5.0-1
    • 25.5.0-2
    • 25.5.0-3
    • 25.5.0-4
    • 25.5.0-5
    • 26.4.0-1
    • 26.4.0-2
    • 26.4.0-3
    • 26.4.0-4
    • 26.4.0-5
    • 26.4.0-6
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • twisted PyPI

    Versions
    • 1.0.1
    • 1.0.3
    • 1.0.4
    • 1.0.5
    • 1.0.6
    • 1.0.7
    • 1.1.0
    • 1.1.1
    • 1.2.0
    • 10.0.0
    • 10.1.0
    • 10.2.0
    • 11.0.0
    • 11.1.0
    • 12.0.0
    • 12.1.0
    • 12.2.0
    • 12.3.0
    • 13.0.0
    • 13.1.0
    • 13.2.0
    • 14.0.0
    • 14.0.1
    • 14.0.2
    • 15.0.0
    • 15.1.0
    • 15.2.0
    • 15.2.1
    • 15.3.0
    • 15.4.0
    • 15.5.0
    • 16.0.0
    • 16.1.0
    • 16.1.1
    • 16.2.0
    • 16.3.0
    • 16.3.1
    • 16.3.2
    • 16.4.0
    • 16.4.1
    • 16.5.0
    • 16.5.0rc1
    • 16.5.0rc2
    • 16.6.0
    • 16.6.0rc1
    • 16.7.0rc1
    • 16.7.0rc2
    • 17.1.0
    • 17.1.0rc1
    • 17.5.0
    • 17.9.0
    • 17.9.0rc1
    • 18.4.0
    • 18.4.0rc1
    • 18.7.0
    • 18.7.0rc1
    • 18.7.0rc2
    • 18.9.0
    • 18.9.0rc1
    • 19.10.0
    • 19.10.0rc1
    • 19.2.0
    • 19.2.0rc1
    • 19.2.0rc2
    • 19.2.1
    • 19.7.0
    • 19.7.0rc1
    • 2.1.0
    • 2.4.0
    • 2.5.0
    • 20.3.0
    • 20.3.0rc1
    • 21.2.0
    • 21.2.0rc1
    • 21.7.0
    • 21.7.0rc1
    • 21.7.0rc2
    • 21.7.0rc3
    • 22.1.0
    • 22.1.0rc1
    • 22.10.0
    • 22.10.0rc1
    • 22.2.0
    • 22.2.0rc1
    • 22.4.0
    • 22.4.0rc1
    • 22.8.0
    • 22.8.0rc1
    • 23.10.0
    • 23.10.0rc1
    • 23.8.0
    • 23.8.0rc1
    • 24.10.0
    • 24.10.0rc1
    • 24.11.0
    • 24.11.0rc1
    • 24.11.0rc2
    • 24.2.0rc1
    • 24.3.0
    • 24.7.0
    • 24.7.0rc1
    • 24.7.0rc2
    • 25.5.0
    • 25.5.0rc1
    • 26.4.0
    • 26.4.0rc2
    • 8.0.0
    • 8.0.1
    • 8.1.0
    • 8.2.0
    • 9.0.0
    Affected ranges
    • ECOSYSTEM: < 26.10.0rc1

    Update to 26.10.0rc1

  • twisted Ubuntu:Pro:14.04:LTS

    Versions
    • 13.0.0-1ubuntu1
    • 13.2.0-1ubuntu1
    • 13.2.0-1ubuntu1.2
    • 13.2.0-1ubuntu1.2+esm1
    • 13.2.0-1ubuntu1.2+esm2
    • 13.2.0-1ubuntu1.2+esm3
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • twisted Ubuntu:Pro:16.04:LTS

    Versions
    • 15.2.1-1ubuntu2
    • 15.5.0-1
    • 15.5.0-2
    • 15.5.0-2ubuntu1
    • 15.5.0-4
    • 16.0.0~pre1-1
    • 16.0.0~pre1-1ubuntu1
    • 16.0.0~pre1-2ubuntu1
    • 16.0.0~pre1-3
    • 16.0.0-1
    • 16.0.0-1ubuntu0.2
    • 16.0.0-1ubuntu0.4
    • 16.0.0-1ubuntu0.4+esm1
    • 16.0.0-1ubuntu0.4+esm2
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • twisted Ubuntu:Pro:18.04:LTS

    Versions
    • 16.6.0-2ubuntu3
    • 17.9.0-1
    • 17.9.0-2
    • 17.9.0-2ubuntu0.1
    • 17.9.0-2ubuntu0.3
    • 17.9.0-2ubuntu0.3+esm1
    • 17.9.0-2ubuntu0.3+esm2
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • twisted Ubuntu:20.04:LTS

    Versions
    • 18.9.0-3ubuntu1
    • 18.9.0-5
    • 18.9.0-6
    • 18.9.0-6build1
    • 18.9.0-6ubuntu1
    • 18.9.0-8
    • 18.9.0-11
    • 18.9.0-11ubuntu0.20.04.1
    • 18.9.0-11ubuntu0.20.04.2
    • 18.9.0-11ubuntu0.20.04.3
    • 18.9.0-11ubuntu0.20.04.4
    • 18.9.0-11ubuntu0.20.04.5
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • twisted Ubuntu:22.04:LTS

    Versions
    • 20.3.0-7ubuntu1
    • 20.3.0-7ubuntu3
    • 22.1.0-2ubuntu2
    • 22.1.0-2ubuntu2.1
    • 22.1.0-2ubuntu2.3
    • 22.1.0-2ubuntu2.4
    • 22.1.0-2ubuntu2.5
    • 22.1.0-2ubuntu2.6
    • 22.1.0-2ubuntu2.7
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • twisted Ubuntu:24.04:LTS

    Versions
    • 22.4.0-4
    • 22.4.0-4ubuntu1
    • 23.10.0-2
    • 24.3.0-1
    • 24.3.0-1ubuntu0.1
    • 24.3.0-1ubuntu0.2
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • twisted Ubuntu:26.10

    Versions
    • 25.5.0-5
    • 26.4.0-4
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • twisted Ubuntu:26.04:LTS

    Versions
    • 24.11.0-1
    • 25.5.0-4
    • 25.5.0-5
    • 25.5.0-5ubuntu0.1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

Original sources

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