{"id":"CVE-2026-115778","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-115778","generatedAt":"2026-10-28T01:00:53.579Z","title":"Twisted is an event-based framework for internet applications, supporting Python 3.6+.","description":"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.","published":"2026-10-23T21:17:23.000Z","lastModified":"2026-10-26T14:05:17.000Z","status":"Awaiting Analysis","sourceIdentifier":"security-advisories@github.com","cvss":{"version":"3.1","score":7.5,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},"cwe":["CWE-400","CWE-770"],"affected":[],"epss":{"score":0.0054,"percentile":0.45194,"date":"2026-10-26","history":[{"date":"2026-10-24","score":0.00742,"percentile":0.5422}]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"high","text":"High impact if exploited, but EPSS currently rates exploitation as unlikely (0.54%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit."},"changes":[{"kind":"new","label":"New CVE","at":"2026-10-23T21:17:23.000Z","detail":{"score":"7.5","severity":"HIGH","publishedAt":"2026-10-23T21:17:23.320Z"},"summary":"New CVE, high severity (CVSS 7.5)."}],"references":[{"url":"https://github.com/twisted/twisted/commit/073ba878c6c07d569cb61abc5ae76d46eff1b529","source":"security-advisories@github.com"},{"url":"https://github.com/twisted/twisted/commit/5d91cc66a3591faba758a80a1479e0103602facc","source":"security-advisories@github.com"},{"url":"https://github.com/twisted/twisted/pull/12750","source":"security-advisories@github.com"},{"url":"https://github.com/twisted/twisted/releases/tag/twisted-26.10.0rc1","source":"security-advisories@github.com"},{"url":"https://github.com/twisted/twisted/security/advisories/GHSA-cwm5-jh59-mwxr","source":"security-advisories@github.com"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-115778","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}