CVE-2026-115776
highTwisted is an event-based framework for internet applications, supporting Python 3.6+.
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:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Affected products
Not reported by the source (unknown — not "none").
Weakness classification (CWE)
Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.
Mitigation & advisories
No vendor advisory or patch reference tagged by NVD. Check the references below.
References
- https://github.com/twisted/twisted/commit/01f8cff7753c1edac132380b2ea939fa6bdbab30 security-advisories@github.com
- https://github.com/twisted/twisted/commit/ac90fb7b0ab73688a581fcd9a7c0577ec8ca3059 security-advisories@github.com
- https://github.com/twisted/twisted/pull/12771 security-advisories@github.com
- https://github.com/twisted/twisted/releases/tag/twisted-26.10.0rc1 security-advisories@github.com
- https://github.com/twisted/twisted/security/advisories/GHSA-53xc-49m8-p798 security-advisories@github.com