cyfenced.com →

[ CVE-2026-115775 · Published 23 Oct 2026 ]

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

CVSS 8.7 EPSS <1%Fix available

[ Description ]Official description

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.

[ Fixes ]Fixes and patches

  • Twisted 26.10.0rc1Fixed version · GitHub Advisories · pip package Twisted: upgrade to 26.10.0rc1 or later (affected <= 26.4.0)

[ Packages ]Affected open-source packages

[ References ]References