{
    "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": "2026-10-23T20:25:12.031Z"
    },
    "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"
            }
        }
    }
}