CVE-2026-115877

{"id": "CVE-2026-115877", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-115877", "role": "CISA Coordinator", "options": [{"exploitation": "poc"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "version": "2.0.3", "timestamp": "2026-10-29T14:21:44.755036Z"}}], "cvssMetricV31": [{"type": "Secondary", "source": "security-advisories@github.com", "cvssData": {"scope": "CHANGED", "version": "3.1", "baseScore": 5.4, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:N", "integrityImpact": "LOW", "userInteraction": "NONE", "attackComplexity": "HIGH", "availabilityImpact": "NONE", "privilegesRequired": "NONE", "confidentialityImpact": "LOW"}, "impactScore": 2.7, "exploitabilityScore": 2.2}]}, "affected": [{"source": "security-advisories@github.com", "affectedData": [{"vendor": "twisted", "product": "twisted", "versions": [{"status": "affected", "version": "< 26.10.0rc1"}]}]}], "published": "2026-10-23T21:17:23.643", "references": [{"url": "https://github.com/twisted/twisted/commit/022b6f7feb5980166c71f54e2c0d8f4f21ff6e1a", "source": "security-advisories@github.com"}, {"url": "https://github.com/twisted/twisted/commit/1616f702d36eda8990a5a5b22ad70fab140a7eb1", "source": "security-advisories@github.com"}, {"url": "https://github.com/twisted/twisted/pull/12755", "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-q7qq-6mhp-9rc4", "source": "security-advisories@github.com"}, {"url": "https://github.com/twisted/twisted/security/advisories/GHSA-q7qq-6mhp-9rc4", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"}], "vulnStatus": "Awaiting Analysis", "weaknesses": [{"type": "Secondary", "source": "security-advisories@github.com", "description": [{"lang": "en", "value": "CWE-444"}]}], "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."}], "lastModified": "2026-10-29T15:17:19.207", "sourceIdentifier": "security-advisories@github.com"}