{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "0"
              },
              {
                "fixed": "3.12.0"
              },
              {
                "fixed": "3.12.1"
              }
            ],
            "source": [
              "AFFECTED_FIELD",
              "DESCRIPTION"
            ]
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "a7a26f1ee0adfeabb5ee85a6eb2a62cff601a70b"
            }
          ],
          "repo": "https://github.com/actix/actix-web",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-xhj4-vrgc-hr34"
  ],
  "database_specific": {
    "cna_assigner": "VulnCheck",
    "cwe_ids": [
      "CWE-444"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/73xxx/CVE-2026-73051.json"
  },
  "details": "actix-http versions before 3.12.1 contain an HTTP request smuggling vulnerability in the HTTP/1.1 parser that accepts requests with both Content-Length and Transfer-Encoding: chunked headers. Unauthenticated remote attackers can exploit this through a front-end intermediary to desynchronize backend requests and smuggle malicious HTTP requests to the Actix service.",
  "id": "CVE-2026-73051",
  "modified": "2026-08-16T03:31:12.465168566Z",
  "published": "2026-08-14T11:35:45.780Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/73xxx/CVE-2026-73051.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/actix/actix-web/security/advisories/GHSA-xhj4-vrgc-hr34"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-73051"
    },
    {
      "type": "ADVISORY",
      "url": "https://www.vulncheck.com/advisories/actix-http-before-http-request-smuggling-via-cl-te"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "actix-http before 3.12.1 HTTP Request Smuggling via CL.TE"
}