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Vulnerabilities

Vulnerability · CVE-2026-115775

Twisted: Unauthenticated Remote Denial of Service in the Twisted words domish XML Element Stream via an Unbounded Element Tree

Published Oct 23, 2026 · catalog updated Oct 24, 2026 · Red Hat Red Hat Enterprise Linux

Last checked Nov 6, 2026. A connected source was read within the last 7 days.

Check if you run it

No confirmed exploitation is on record for CVE-2026-115775. EPSS is 0.44%. Act only if a listed version of Red Hat Red Hat Enterprise Linux is installed.

Gaps on this record

  • No vendor fix or required action is stored. Compare the linked advisory before you change production.

Same product and reporting

Severity
High7.5
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.44%
Remediation
Advisory link
Affected products
Debian:12 twisted · Debian:13 twisted · Debian:14 twisted · pypi twisted

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.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • Debian:12 twisted22.4.0-4, 22.4.0-4+deb12u1, 23.10.0-1
  • Debian:13 twisted24.11.0-1, 25.5.0-1, 25.5.0-2
  • Debian:14 twisted24.11.0-1, 25.5.0-1, 25.5.0-2
  • pypi twistedversion unspecified

How to fix CVE-2026-115775

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2026-115775. EPSS is 0.44%. Act only if a listed version of Red Hat Red Hat Enterprise Linux is installed.

Which versions are affected?

Compare what you have installed with 22.4.0-4, 22.4.0-4+deb12u1, 23.10.0-1, 24.11.0-1, 25.5.0-1, 25.5.0-2. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

CWE-770: Allocation of Resources Without Limits or Throttling. EPSS 0.44%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Technology hubs

Debian security

Code

The project this record applies to. Exploit listings stay in References.

Timeline

Detection, updates, and resolution for this record.

  1. Oct 23, 2026 · Red Hat Security Data

    Detected

    twisted: twisted: Denial of Service via memory exhaustion in XML stream parser

  2. Oct 24, 2026 · Trivy Vulnerability DB

    Updated

    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-authentic

Sources

  • CVE.orgVulnerability recordCVE-2026-115775

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2026-115775

    30-day exploitation probability 0.44%

    first.org
  • GitLab Advisory DatabasePackage advisoryCVE-2026-115775

    An allocation-without-limits vulnerability in the Twisted XML element stream lets any unauthenticated remote peer exhaust server memory over a single stream. When the peer opens a container element and streams child elements without ever closing the container, every element is materialised into an in-memory tree with no limit on depth or child count. An element is released only when its end tag ar

    advisories.gitlab.com
  • Red Hat Security DataVendor advisoryCVE-2026-115775

    twisted: twisted: Denial of Service via memory exhaustion in XML stream parser

    access.redhat.com
  • Trivy Vulnerability DBPackage advisoryDEBIAN-CVE-2026-115775

    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

    osv.dev

References

Freshness

Last verified in this catalog Nov 6, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.

  • FIRST EPSSNov 6, 2026
  • GitLab Advisory DatabaseOct 27, 2026
  • Red Hat Security DataOct 26, 2026
  • CVE.orgOct 24, 2026
  • Trivy Vulnerability DBOct 24, 2026