{"id":"CVE-2026-73051","summary":"actix-http before 3.12.1 HTTP Request Smuggling via CL.TE","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.","aliases":["GHSA-xhj4-vrgc-hr34"],"modified":"2026-08-16T03:48:28.539051541Z","published":"2026-08-14T11:35:45.780Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/73xxx/CVE-2026-73051.json","cna_assigner":"VulnCheck","cwe_ids":["CWE-444"]},"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"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/actix/actix-web","events":[{"introduced":"0"},{"fixed":"a7a26f1ee0adfeabb5ee85a6eb2a62cff601a70b"}],"database_specific":{"extracted_events":[{"introduced":"0"},{"fixed":"3.12.0"},{"fixed":"3.12.1"}],"source":["AFFECTED_FIELD","DESCRIPTION"]}}],"versions":["router-v0.5.4","files-v0.6.10","web-v4.12.1","files-v0.6.9","web-v4.12.0","http-v3.11.2","awc-v3.8.1","files-v0.6.8","awc-v3.8.0","files-v0.6.7","http-v3.11.1","web-v4.11.0","http-v3.11.0","awc-v3.7.0","web-v4.10.2","web-v4.10.1","web-v4.10.0","http-v3.10.0","awc-v3.6.0","awc-v3.5.1","web-v4.9.0","http-v3.9.0","actors-v4.3.1","multipart-v0.7.2","multipart-derive-v0.7.0","multipart-v0.7.1","multipart-v0.7.0","web-v4.8.0","http-v3.8.0","test-v0.1.5","files-v0.6.6","web-v4.7.0","test-v0.1.4","multipart-v0.6.2","codegen-v4.3.0","router-v0.5.3","web-v4.6.0","http-v3.7.0","awc-v3.5.0","web-v4.5.1","web-v4.5.0","test-v0.1.3","http-v3.6.0","http-test-v3.2.0","awc-v3.4.0","actors-v4.3.0","files-v0.6.5","files-v0.6.4","http-v3.5.1","router-v0.5.2","web-v4.4.1","http-v3.5.0","awc-v3.3.0","codegen-v4.2.2","web-v4.4.0","test-v0.1.2","http-v3.4.0","awc-v3.2.0","codegen-v4.2.1","multipart-v0.6.1","multipart-derive-v0.6.1","http-v3.3.1","multipart-v0.6.0","multipart-derive-v0.6.0","test-v0.1.1","web-v4.3.1","codegen-v4.2.0","awc-v3.1.1","multipart-v0.5.0","files-v0.6.3","http-test-v3.1.0","actors-v4.2.0","web-v4.3.0","awc-v3.1.0","http-v3.3.0","router-v0.5.1","web-v4.2.1","web-v4.2.0","http-v3.2.2","codegen-v4.1.0","awc-v3.0.1","test-v0.1.0","http-v3.2.0","http-test-v3.0.0","files-v0.6.2","http-v3.2.1","web-v4.1.0","http-v3.1.0","files-v0.6.1","codegen-v4.0.1","http-v3.0.4","http-v3.0.3","awc-v3.0.0","http-v3.0.2","http-v3.0.1","actors-v4.1.0","multipart-v0.4.0","actors-v4.0.0","files-v0.6.0","web-v4.0.1","web-v4.0.0","http-v3.0.0","codegen-v4.0.0","codegen-v0.5.0","router-v0.5.0","http-v3.0.0-rc.4","test-v0.1.0-beta.13","http-test-v3.0.0-beta.13","actors-v4.0.0-beta.12","awc-v3.0.0-beta.21","http-v3.0.0-rc.3","web-v4.0.0-rc.3","http-v3.0.0-rc.2","web-v4.0.0-rc.2","test-v0.1.0-beta.12","router-v0.5.0-rc.3","multipart-v0.4.0-beta.13","http-test-v3.0.0-beta.12","files-v0.6.0-beta.16","codegen-v0.5.0-rc.2","awc-v3.0.0-beta.20","actors-v4.0.0-beta.11","web-v4.0.0-rc.1","http-v3.0.0-rc.1","web-v4.0.0-beta.21","http-v3.0.0-beta.19","files-v0.6.0-beta.15","awc-v3.0.0-beta.19","router-v0.5.0-rc.2","web-v4.0.0-beta.20","router-v0.5.0-rc.1","files-v0.6.0-beta.14","web-v4.0.0-beta.19","test-v0.1.0-beta.11","router-v0.5.0-beta.4","multipart-v0.4.0-beta.12","http-v3.0.0-beta.18","http-test-v3.0.0-beta.11","files-v0.6.0-beta.13","codegen-v0.5.0-rc.1","awc-v3.0.0-beta.18","actors-v4.0.0-beta.10","web-v4.0.0-beta.18","awc-v3.0.0-beta.17","web-v4.0.0-beta.17","files-v0.6.0-beta.12","awc-v3.0.0-beta.16","web-v4.0.0-beta.16","test-v0.1.0-beta.10","multipart-v0.4.0-beta.11","http-v3.0.0-beta.17","http-test-v3.0.0-beta.10","files-v0.6.0-beta.11","awc-v3.0.0-beta.15","actors-v4.0.0-beta.9","web-v4.0.0-beta.15","test-v0.1.0-beta.9","router-v0.5.0-beta.3","http-v3.0.0-beta.16","awc-v3.0.0-beta.14","web-v4.0.0-beta.14","test-v0.1.0-beta.8","multipart-v0.4.0-beta.10","http-v3.0.0-beta.15","http-test-v3.0.0-beta.9","files-v0.6.0-beta.10","codegen-v0.5.0-beta.6","awc-v3.0.0-beta.13","actors-v4.0.0-beta.8","multipart-v0.4.0-beta.9","web-v4.0.0-beta.13","http-v3.0.0-beta.14","http-test-v3.0.0-beta.8","awc-v3.0.0-beta.12","web-v4.0.0-beta.12","test-v0.1.0-beta.7","multipart-v0.4.0-beta.8","http-v3.0.0-beta.13","http-test-v3.0.0-beta.7","files-v0.6.0-beta.9","awc-v3.0.0-beta.11","web-v4.0.0-beta.11","test-v0.1.0-beta.6","http-v3.0.0-beta.12","http-test-v3.0.0-beta.6","awc-v3.0.0-beta.10","test-v0.1.0-beta.5","multipart-v0.4.0-beta.7","files-v0.6.0-beta.8","web-v4.0.0-beta.10","http-v3.0.0-beta.11","codegen-v0.5.0-beta.5","awc-v3.0.0-beta.9","web-v4.0.0-beta.9","test-v0.1.0-beta.4","router-v0.5.0-beta.2","multipart-v0.4.0-beta.6","http-v3.0.0-beta.10","http-test-v3.0.0-beta.5","files-v0.6.0-beta.7","codegen-v0.5.0-beta.4","awc-v3.0.0-beta.8","actors-v4.0.0-beta.7","web-v3.3.2","web-v4.0.0-beta.8","http-v3.0.0-beta.8","files-v0.6.0-beta.6","awc-v3.0.0-beta.7","actors-v4.0.0-beta.6","test-v0.1.0-beta.3","web-v4.0.0-beta.7","multipart-v0.4.0-beta.5","http-v3.0.0-beta.7","files-v0.6.0-beta.5","codegen-v0.5.0-beta.3","awc-v3.0.0-beta.6","actors-v4.0.0-beta.5","test-v0.1.0-beta.2","web-v4.0.0-beta.6","http-v3.0.0-beta.6","awc-v3.0.0-beta.5","test-v0.1.0-beta.1","multipart-v0.4.0-beta.4","http-test-v3.0.0-beta.4","actors-v4.0.0-beta.4","web-v4.0.0-beta.5","http-v3.0.0-beta.5","files-v0.6.0-beta.4","awc-v3.0.0-beta.4","web-v4.0.0-beta.4","web-actors-v4.0.0-beta.3","multipart-v0.4.0-beta.3","http-test-v3.0.0-beta.3","files-v0.6.0-beta.3","codegen-v0.5.0-beta.2","http-v3.0.0-beta.4","awc-v3.0.0-beta.3","http-v3.0.0-beta.3","web-v4.0.0-beta.3","codegen-v0.5.0-beta.1","web-v4.0.0-beta.2","multipart-v0.4.0-beta.2","http-v3.0.0-beta.2","http-test-v3.0.0-beta.2","files-v0.6.0-beta.2","awc-v3.0.0-beta.2","actors-v4.0.0-beta.2","web-v4.0.0-beta.1","multipart-v0.4.0-beta.1","http-v3.0.0-beta.1","files-v0.6.0-beta.1","awc-v3.0.0-beta.1","actors-v4.0.0-beta.1","files-v0.5.0","web-v3.3.1","awc-v2.0.3","web-v3.3.0","http-test-v2.1.0","http-v2.2.0","awc-v2.0.2","files-v0.4.1","files-v0.4.0","web-v3.2.0","http-v2.1.0","awc-v2.0.1","web-v3.1.0","codegen-v0.4.0","web-v3.0.2","web-v3.0.1","web-v3.0.0","multipart-v0.3.0","http-v2.0.0","http-test-v2.0.0","files-v0.3.0","codegen-v0.3.0","awc-v2.0.0","actors-v3.0.0","multipart-v0.3.0-beta.2","actors-v3.0.0-beta.2","web-v3.0.0-beta.4","http-v2.0.0-beta.4","awc-v2.0.0-beta.4","web-v3.0.0-beta.3","awc-v2.0.0-beta.3","web-v3.0.0-beta.2","http-v2.0.0-beta.3","http-v2.0.0-beta.2","awc-v2.0.0-beta.2","awc","multipart-v0.3.0-beta.1","files-v0.3.0-beta.1","actors-v3.0.0-beta.1","web-v3.0.0-beta.1","codegen-v0.3.0-beta.1","awc-v2.0.0-beta.1","http-v2.0.0-beta.1","files-v0.3.0-alpha.1","codegen-v0.2.2","http-test-v2.0.0-alpha.1","web-v3.0.0-alpha.3","awc-v2.0.0-alpha.2","http-v2.0.0-alpha.4","web-v3.0.0-alpha.2","actors-v3.0.0-alpha.1","http-v2.0.0-alpha.3","web-v3.0.0-alpha.1","awc-v2.0.0-alpha.1","http-v2.0.0-alpha.2","http-v2.0.0-alpha.1","codegen-v0.2.1","identity-v0.2.1","web-v2.0.0","framed-v0.3.0","files-v0.2.1","session-v0.3.0","multipart-v0.2.0","identity-v0.2.0","files-v0.2.0","cors-v0.2.0","actors-v2.0.0","web-v2.0.0-rc","http-v1.0.1","awc-v1.0.1","http-test-v1.0.0","http-v1.0.0","awc-v1.0.0","actors-v1.0.3","v2.0.0-alpha.3","v2.0.0-alpha.1","web-v1.0.9","awc-v0.2.8","files-v0.1.7","http-v0.2.11","codegen-v0.1.3","files-v0.1.6","files-v0.1.5","web-v1.0.8","awc-v0.2.7","http-test-v0.2.5","multipart-v0.1.4","awc-v0.2.6","awc-v0.2.5","http-v0.2.10","web-v1.0.7","web-v1.0.6","multipart-v0.1.3","awc-v0.2.4","http-v0.2.9","awc-v0.2.3","http-v0.2.8","files-v0.1.4","actors-v1.0.2","framed-v0.2.1","web-v1.0.5","http-v0.2.7","web-v1.0.4","http-v0.2.6","http-test-v0.2.3","session-v0.2.0","awc-v0.2.2","web-v1.0.3","http-v0.2.5","files-v0.1.3","actors-v1.0.1","web-v1.0.2","web-v1.0.1","http-test-v0.2.2","http-v0.2.4","cors-v0.1.0","files-v0.1.2","identity-v0.1.0","web-v1.0.0","http-test-v0.2.1","awc-v0.2.1","codegen-v0.1.2","session-v0.1.1","files-v0.1.1","http-v0.2.3","multipart-v0.1.2","codegen-v0.1.1","actors-v1.0.0","http-v0.2.2","multipart-v0.1.1","http-v0.2.1","files-v0.1.0","session-v0.1.0","multipart-v0.1.0","web-v1.0.0-rc","codegen-v0.1.0","web-v1.0.0-beta.4","framed-v0.2.0","awc-v0.2.0","http-v0.2.0","web-v1.0.0-beta.3","http-v0.1.5","session-v0.1.0-beta.2","web-v1.0.0-beta.2","http-v0.1.4","http-test-v0.1.1","http-v0.1.3","http-v0.1.2","multipart-v0.1.0-beta.1","v1.0.0-beta.1","awc-v0.1.1","http-v0.1.1","framed-v0.1.0","http-test-v0.1.0","awc-v0.1.0","http-v0.1.0","v1.0.0-alpha.6","v1.0.0-alpha.5","v1.0.0-alpha.4","v1.0.0-alpha.3","v1.0.0-alpha.2","http-v0.1.0-alpha.1","0.7.18","0.7.17","0.7.16","0.7.15","v0.7.14","v0.7.13","v0.7.12","v0.7.11","v0.7.10","v0.7.9","v0.7.8","v0.7.7","v0.7.6","v0.7.5","v0.7.4","v0.7.3","v0.7.2","v0.7.1","v0.7.0","v0.6.10","v0.6.9","v0.6.8","v0.6.7","v0.6.6","v0.6.5","v0.6.4","v0.6.3","v0.6.2","v0.6.1","v0.6.0","v0.5.5","v0.5.4","v0.5.3","v0.5.2","v0.5.1","v0.5.0","v0.4.10","v0.4.9","v0.4.8","v0.4.7","v0.4.6","v0.4.5","v0.4.4","v0.4.3","v0.4.2","v0.4.1","v0.4.0","v0.3.3","v0.3.2","v0.3.1","v0.3.0","v0.2.1","v0.2.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-73051.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V4","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"}]}