{"api_version":"1","generated_at":"2026-04-22T15:40:22+00:00","cve":"CVE-2021-33037","urls":{"html":"https://cve.report/CVE-2021-33037","api":"https://cve.report/api/cve/CVE-2021-33037.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2021-33037","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2021-33037"},"summary":{"title":"CVE-2021-33037","description":"Apache Tomcat 10.0.0-M1 to 10.0.6, 9.0.0.M1 to 9.0.46 and 8.5.0 to 8.5.66 did not correctly parse the HTTP transfer-encoding request header in some circumstances leading to the possibility to request smuggling when used with a reverse proxy. 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Specifically: - Tomcat incorrectly ignored the transfer encoding header if the client declared it would only accept an HTTP/1.0 response; - Tomcat honoured the identify encoding; and - Tomcat did not ensure that, if present, the chunked encoding was the final encoding."}]},"generator":{"engine":"Vulnogram 0.0.9"},"impact":[[]],"problemtype":{"problemtype_data":[{"description":[{"lang":"eng","value":"CWE-444 Inconsistent Interpretation of HTTP Requests ('HTTP Request 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Tomcat 10.0.0-M1 to 10.0.6, 9.0.0.M1 to 9.0.46 and 8.5.0 to 8.5.66 did not correctly parse the HTTP transfer-encoding request header in some circumstances leading to the possibility to request smuggling when used with a reverse proxy. Specifically: - Tomcat incorrectly ignored the transfer encoding header if the client declared it would only accept an HTTP/1.0 response; - Tomcat honoured the identify encoding; and - Tomcat did not ensure that, if present, the chunked encoding was the final encoding.","Type":"Description","Title":null},{"CveYear":"2021","CveId":"33037","Ordinal":"2","NoteData":"2021-07-12","Type":"Other","Title":"Published"},{"CveYear":"2021","CveId":"33037","Ordinal":"3","NoteData":"2022-02-07","Type":"Other","Title":"Modified"}]}}}