{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "0"
              },
              {
                "fixed": "24.12.1"
              },
              {
                "introduced": "25.12.0"
              },
              {
                "fixed": "25.12.1"
              }
            ],
            "source": [
              "AFFECTED_FIELD",
              "REFERENCES"
            ]
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "introduced": "785d77f8fe208576a48d339bd81d866021154092"
            },
            {
              "fixed": "47349d689d65fa1907977ac100e867894aeafb22"
            },
            {
              "fixed": "ef9240ce844472745fa213de216a37e188431fa6"
            },
            {
              "fixed": "69a10d3b06babaa9e5f6d1af577364e9e53b6dea"
            },
            {
              "fixed": "a332796506c7c588b6930b02a8886e43eb8ea8d6"
            }
          ],
          "repo": "https://github.com/sanic-org/sanic",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-wmj6-g64g-j7q5"
  ],
  "database_specific": {
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
      "CWE-444"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/85xxx/CVE-2026-85078.json"
  },
  "details": "Sanic is an opensource python web server/framework. In version 25.12.0, Sanic's core HTTP/1.1 chunked-body handling does not fully consume the trailer-part after the terminating zero chunk before reusing the keep-alive connection buffer. A remote unauthenticated client can place attacker-controlled bytes in that trailer region, causing Sanic to parse and route them as a hidden second request after the outer request. This breaks HTTP request-boundary integrity and can provide a request-smuggling primitive when Sanic is deployed behind intermediaries. This issue is fixed in version 25.12.1.",
  "id": "CVE-2026-85078",
  "modified": "2026-09-19T03:30:33.689246164Z",
  "published": "2026-09-17T14:28:37.286Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/sanic-org/sanic/releases/tag/v24.12.1"
    },
    {
      "type": "WEB",
      "url": "https://github.com/sanic-org/sanic/releases/tag/v25.12.1"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/85xxx/CVE-2026-85078.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/sanic-org/sanic/security/advisories/GHSA-wmj6-g64g-j7q5"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-85078"
    },
    {
      "type": "FIX",
      "url": "https://github.com/sanic-org/sanic/commit/47349d689d65fa1907977ac100e867894aeafb22"
    },
    {
      "type": "FIX",
      "url": "https://github.com/sanic-org/sanic/commit/69a10d3b06babaa9e5f6d1af577364e9e53b6dea"
    },
    {
      "type": "FIX",
      "url": "https://github.com/sanic-org/sanic/commit/a332796506c7c588b6930b02a8886e43eb8ea8d6"
    },
    {
      "type": "FIX",
      "url": "https://github.com/sanic-org/sanic/pull/3164"
    },
    {
      "type": "FIX",
      "url": "https://github.com/sanic-org/sanic/pull/3165"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L",
      "type": "CVSS_V3"
    }
  ],
  "summary": "sanic chunked trailer request smuggling allows hidden second request execution"
}