CVE catalog
CVE-2026-115776
twisted: CVE-2026-115776
- Severity
- High · CVSS 7.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Published
- Source
- [NVD] · [CVE record]
- EPSS
- 0.50% · Oct 25, 2026
Twisted is an event-based framework for internet applications, supporting Python 3.6+. Prior to 26.10.0rc1, twisted.words.protocols.irc.IRC.dataReceived retains all bytes received without a line feed in its per-connection buffer and applies no maximum line length. The twisted.words.service.IRCUser server subclass inherits this behavior, and buffering occurs before PASS, NICK, or USER authentication commands. An unauthenticated connection can continuously grow the buffer until the shared server process runs out of memory and drops all users. 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/01f8cff7753c1edac132380b2ea939fa6bdbab30]
- [https://github.com/twisted/twisted/commit/ac90fb7b0ab73688a581fcd9a7c0577ec8ca3059]
- [https://github.com/twisted/twisted/pull/12771]
- [https://github.com/twisted/twisted/releases/tag/twisted-26.10.0rc1]
- [https://github.com/twisted/twisted/security/advisories/GHSA-53xc-49m8-p798]
- [https://nvd.nist.gov/vuln/detail/CVE-2026-115776]
- [https://osv.dev/vulnerability/DEBIAN-CVE-2026-115776]
- [https://osv.dev/vulnerability/UBUNTU-CVE-2026-115776]
- [https://security-tracker.debian.org/tracker/CVE-2026-115776]
- [https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-115776.json]
[Debian Security Tracker] · [FIRST EPSS] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX]