Vulnerability Description
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.
CVSS Score
HIGH
Related Weaknesses (CWE)
References
- https://github.com/twisted/twisted/commit/01f8cff7753c1edac132380b2ea939fa6bdbab
- https://github.com/twisted/twisted/commit/ac90fb7b0ab73688a581fcd9a7c0577ec8ca30
- 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
FAQ
What is CVE-2026-115776?
CVE-2026-115776 is a vulnerability with a CVSS score of 7.5 (HIGH). 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 ...
How severe is CVE-2026-115776?
CVE-2026-115776 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-115776?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.