{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-115877","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","state":"PUBLISHED","assignerShortName":"GitHub_M","dateReserved":"2026-10-23T19:37:27.176Z","datePublished":"2026-10-23T20:25:12.031Z","dateUpdated":"2026-10-29T14:23:05.736Z"},"containers":{"cna":{"title":"Twisted: HTTP Request Smuggling in twisted.web via a Bare CR or LF in a Header Value","problemTypes":[{"descriptions":[{"cweId":"CWE-444","lang":"en","description":"CWE-444: Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')","type":"CWE"}]}],"metrics":[{"cvssV3_1":{"attackComplexity":"HIGH","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":5.4,"baseSeverity":"MEDIUM","confidentialityImpact":"LOW","integrityImpact":"LOW","privilegesRequired":"NONE","scope":"CHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:N","version":"3.1"}}],"references":[{"name":"https://github.com/twisted/twisted/security/advisories/GHSA-q7qq-6mhp-9rc4","tags":["x_refsource_CONFIRM"],"url":"https://github.com/twisted/twisted/security/advisories/GHSA-q7qq-6mhp-9rc4"},{"name":"https://github.com/twisted/twisted/pull/12755","tags":["x_refsource_MISC"],"url":"https://github.com/twisted/twisted/pull/12755"},{"name":"https://github.com/twisted/twisted/commit/022b6f7feb5980166c71f54e2c0d8f4f21ff6e1a","tags":["x_refsource_MISC"],"url":"https://github.com/twisted/twisted/commit/022b6f7feb5980166c71f54e2c0d8f4f21ff6e1a"},{"name":"https://github.com/twisted/twisted/commit/1616f702d36eda8990a5a5b22ad70fab140a7eb1","tags":["x_refsource_MISC"],"url":"https://github.com/twisted/twisted/commit/1616f702d36eda8990a5a5b22ad70fab140a7eb1"},{"name":"https://github.com/twisted/twisted/releases/tag/twisted-26.10.0rc1","tags":["x_refsource_MISC"],"url":"https://github.com/twisted/twisted/releases/tag/twisted-26.10.0rc1"}],"affected":[{"vendor":"twisted","product":"twisted","versions":[{"version":"< 26.10.0rc1","status":"affected"}]}],"providerMetadata":{"orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","shortName":"GitHub_M","dateUpdated":"2026-10-23T20:25:12.031Z"},"descriptions":[{"lang":"en","value":"Twisted is an event-based framework for internet applications, supporting Python 3.6+. Prior to 26.10.0rc1, twisted.web.http.HTTPChannel.headerReceived rejects a NUL byte in an HTTP header value but accepts a bare carriage return or bare line feed. Because Twisted splits header lines only on CRLF, a hidden Content-Length header can remain folded into another value while a lenient front end treats the bare character as a line terminator. The resulting framing disagreement can smuggle a following request past front-end access controls, poison a shared connection or cache, and expose a later client to the wrong response. This issue is an incomplete-fix residual of earlier Twisted request-smuggling protections. This issue is fixed in version 26.10.0rc1."}],"source":{"advisory":"GHSA-q7qq-6mhp-9rc4","discovery":"UNKNOWN"}},"adp":[{"references":[{"url":"https://github.com/twisted/twisted/security/advisories/GHSA-q7qq-6mhp-9rc4","tags":["exploit"]}],"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-10-29T14:21:44.755036Z","id":"CVE-2026-115877","options":[{"Exploitation":"poc"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-10-29T14:23:05.736Z"}}]}}