CVE catalog
CVE-2026-115775
twisted: CVE-2026-115775
- Severity
- High · CVSS 8.7
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X - Published
- Source
- [NVD] · [CVE record]
- EPSS
- 0.44% · Oct 25, 2026
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.
Vulnerable and fixed packages
Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.
| Distribution | Package | Release | Version | Status |
|---|---|---|---|---|
| Debian | twisted | sid | 26.4.0-6 | vulnerable |
| Debian | twisted | forky | 26.4.0-6 | vulnerable |
| Debian | twisted | trixie | 24.11.0-1 | vulnerable |
| Debian | twisted | bookworm | 22.4.0-4+deb12u1 | vulnerable |
| Debian | twisted | bookworm-security | 22.4.0-4+deb12u1 | vulnerable |
| Ubuntu | twisted | pro | 16.6.0-2ubuntu3 | vulnerable |
| Ubuntu | twisted | pro | 17.9.0-1 | vulnerable |
| Ubuntu | twisted | pro | 17.9.0-2 | vulnerable |
| Ubuntu | twisted | pro | 17.9.0-2ubuntu0.1 | vulnerable |
| Ubuntu | twisted | pro | 17.9.0-2ubuntu0.3 | vulnerable |
| Ubuntu | twisted | pro | 17.9.0-2ubuntu0.3+esm1 | vulnerable |
| Ubuntu | twisted | pro | 17.9.0-2ubuntu0.3+esm2 | vulnerable |
| Ubuntu | twisted | 20.04 | 18.9.0-3ubuntu1 | vulnerable |
| Ubuntu | twisted | 20.04 | 18.9.0-5 | vulnerable |
| Ubuntu | twisted | 20.04 | 18.9.0-6 | vulnerable |
| Ubuntu | twisted | 20.04 | 18.9.0-6build1 | vulnerable |
| Ubuntu | twisted | 20.04 | 18.9.0-6ubuntu1 | vulnerable |
| Ubuntu | twisted | 20.04 | 18.9.0-8 | vulnerable |
| Ubuntu | twisted | 20.04 | 18.9.0-11 | vulnerable |
| Ubuntu | twisted | 20.04 | 18.9.0-11ubuntu0.20.04.1 | vulnerable |
| Ubuntu | twisted | 20.04 | 18.9.0-11ubuntu0.20.04.2 | vulnerable |
| Ubuntu | twisted | 20.04 | 18.9.0-11ubuntu0.20.04.3 | vulnerable |
| Ubuntu | twisted | 20.04 | 18.9.0-11ubuntu0.20.04.4 | vulnerable |
| Ubuntu | twisted | 20.04 | 18.9.0-11ubuntu0.20.04.5 | vulnerable |
| Ubuntu | twisted | 22.04 | 20.3.0-7ubuntu1 | vulnerable |
| Ubuntu | twisted | 22.04 | 20.3.0-7ubuntu3 | vulnerable |
| Ubuntu | twisted | 22.04 | 22.1.0-2ubuntu2 | vulnerable |
| Ubuntu | twisted | 22.04 | 22.1.0-2ubuntu2.1 | vulnerable |
| Ubuntu | twisted | 22.04 | 22.1.0-2ubuntu2.3 | vulnerable |
| Ubuntu | twisted | 22.04 | 22.1.0-2ubuntu2.4 | vulnerable |
| Ubuntu | twisted | 22.04 | 22.1.0-2ubuntu2.5 | vulnerable |
| Ubuntu | twisted | 22.04 | 22.1.0-2ubuntu2.6 | vulnerable |
| Ubuntu | twisted | 22.04 | 22.1.0-2ubuntu2.7 | vulnerable |
| Ubuntu | twisted | 24.04 | 22.4.0-4 | vulnerable |
| Ubuntu | twisted | 24.04 | 22.4.0-4ubuntu1 | vulnerable |
| Ubuntu | twisted | 24.04 | 23.10.0-2 | vulnerable |
| Ubuntu | twisted | 24.04 | 24.3.0-1 | vulnerable |
| Ubuntu | twisted | 24.04 | 24.3.0-1ubuntu0.1 | vulnerable |
| Ubuntu | twisted | 24.04 | 24.3.0-1ubuntu0.2 | vulnerable |
| Ubuntu | twisted | 26.10 | 25.5.0-5 | vulnerable |
| Ubuntu | twisted | 26.10 | 26.4.0-4 | vulnerable |
| Ubuntu | twisted | 26.04 | 24.11.0-1 | vulnerable |
| Ubuntu | twisted | 26.04 | 25.5.0-4 | vulnerable |
| Ubuntu | twisted | 26.04 | 25.5.0-5 | vulnerable |
| Ubuntu | twisted | 26.04 | 25.5.0-5ubuntu0.1 | vulnerable |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Debian | twisted | source | sid | (unfixed) | not yet assigned | Not reported | [1151938] |
| Debian | twisted | source | forky | (unfixed) | not yet assigned | Not reported | [1151938] |
| Debian | twisted | source | trixie | (unfixed) | not yet assigned | Not reported | [1151938] |
| Debian | twisted | source | bookworm | (unfixed) | not yet assigned | Not reported | [1151938] |
Notes
[trixie] twisted: Minor issue
OpenFactory catalog packages
[Debian 12 (Bookworm)]
- [python3-twisted]Affected
Source package: [twisted]
Details (4)
22.4.0-4+deb12u1· all · bookwormAffected
dsa · twisted · debian · bookworm; dsa · twisted · debian · 12
22.4.0-4+deb12u1· all · bookwormAffected
dsa · twisted · debian · bookworm; dsa · twisted · debian · 12
22.4.0-4+deb12u1· all · bookworm-securityAffected
dsa · twisted · debian · bookworm; dsa · twisted · debian · 12
22.4.0-4+deb12u1· all · bookworm-securityAffected
dsa · twisted · debian · bookworm; dsa · twisted · debian · 12
- [twisted-doc]Affected
Source package: [twisted]
Details (4)
22.4.0-4+deb12u1· all · bookwormAffected
dsa · twisted · debian · bookworm; dsa · twisted · debian · 12
22.4.0-4+deb12u1· all · bookwormAffected
dsa · twisted · debian · bookworm; dsa · twisted · debian · 12
22.4.0-4+deb12u1· all · bookworm-securityAffected
dsa · twisted · debian · bookworm; dsa · twisted · debian · 12
22.4.0-4+deb12u1· all · bookworm-securityAffected
dsa · twisted · debian · bookworm; dsa · twisted · debian · 12
[Debian 13 (Trixie)]
- [python3-twisted]Affected
Source package: [twisted]
Details (2)
24.11.0-1· all · trixieAffected
dsa · twisted · debian · 13
24.11.0-1· all · trixieAffected
dsa · twisted · debian · 13
- [twisted-doc]Affected
Source package: [twisted]
Details (2)
24.11.0-1· all · trixieAffected
dsa · twisted · debian · 13
24.11.0-1· all · trixieAffected
dsa · twisted · debian · 13
Observed:
References
- [https://github.com/twisted/twisted/commit/8873814bec8288e2466fad4d2c4d64039beb88b0]
- [https://github.com/twisted/twisted/pull/12751]
- [https://github.com/twisted/twisted/releases/tag/twisted-26.10.0rc1]
- [https://github.com/twisted/twisted/security/advisories/GHSA-3476-c5c2-fr73]
- [https://nvd.nist.gov/vuln/detail/CVE-2026-115775]
- [https://osv.dev/vulnerability/DEBIAN-CVE-2026-115775]
- [https://osv.dev/vulnerability/UBUNTU-CVE-2026-115775]
- [https://security-tracker.debian.org/tracker/CVE-2026-115775]
- [https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-115775.json]
[Debian Security Tracker] · [FIRST EPSS] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX]