{
  "containers": {
    "cna": {
      "affected": [
        {
          "product": "twisted",
          "vendor": "twisted",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 26.10.0rc1"
            }
          ]
        }
      ],
      "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."
        }
      ],
      "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"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-444",
              "description": "CWE-444: Inconsistent Interpretation of HTTP Requests (\u0027HTTP Request/Response Smuggling\u0027)",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-23T20:25:12.031Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "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"
        }
      ],
      "source": {
        "advisory": "GHSA-q7qq-6mhp-9rc4",
        "discovery": "UNKNOWN"
      },
      "title": "Twisted: HTTP Request Smuggling in twisted.web via a Bare CR or LF in a Header Value"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-115877",
    "datePublished": "2026-10-23T20:25:12.031Z",
    "dateReserved": "2026-10-23T19:37:27.176Z",
    "dateUpdated": "2026-10-23T20:25:12.031Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}