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CVE-2026-115778

7.5 high SSVC exploitation: none Awaiting Analysis
NVD · CVE.org

Twisted is an event-based framework for internet applications, supporting Python 3.6+. Prior to 26.10.0rc1, twisted.conch.telnet.Telnet.dataReceived appends every byte received after IAC SB to a persistent subnegotiation buffer until IAC SE is received, without applying a maximum length. Telnet option negotiation occurs before authentication, so an unauthenticated peer can omit the terminator and continuously grow the buffer. The resulting memory exhaustion can terminate the process and every service it hosts. This issue is fixed in version 26.10.0rc1.

Fix

Nothing published yet: no patch, vendor advisory or mitigation reference on NVD, no vendor advisory in the News for this CVE, not in CISA's KEV, no fixed package version. BaselineWatch does not guess at one.

Change history 3

  1. StatusPublished → Awaiting AnalysisNVD modified 2026-10-26 14:05
  2. StatusReceived → PublishedNVD modified 2026-10-23 20:55
  3. First seenCVSS 7.5NVD modified 2026-10-23 21:17

Affected (CPE criteria) 0

NVD has not attached CPE configurations yet.

References 5