CVE-2021-33037
Incorrect Transfer-Encoding handling with HTTP/1.0
At a glance Severity Not available EPSS EPSS 74.67 % · percentile 99 (2026-10-27) State PUBLISHED Published 2021-07-12 Updated 2026-10-08 Assigner apache NVD status Modified 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. 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.
Scores Version Score Vector Scored by CVSS 3.1 MEDIUM 5.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N NVD · nvd@nist.gov (Primary) CVSS 2.0 MEDIUM 5.0 AV:N/AC:L/Au:N/C:N/I:P/A:N NVD · nvd@nist.gov (Primary)
Weaknesses (CWE)
Advisories
European references
CERT-FR advisories
Affected configurations (NVD CPE) cpe:2.3:a:apache:tomcat:*:*:*:*:*:*:*:* ≥ 8.5.0 ≤ 8.5.66cpe:2.3:a:apache:tomcat:*:*:*:*:*:*:*:* > 9.0.0 ≤ 9.0.46cpe:2.3:a:apache:tomcat:*:*:*:*:*:*:*:* > 10.0.0 ≤ 10.0.6cpe:2.3:a:apache:tomee:8.0.6:*:*:*:*:*:*:*cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*cpe:2.3:a:oracle:agile_product_lifecycle_management:9.3.6:*:*:*:*:*:*:*cpe:2.3:a:oracle:communications_cloud_native_core_policy:1.14.0:*:*:*:*:*:*:*cpe:2.3:a:oracle:communications_cloud_native_core_service_communication_proxy:1.14.0:*:*:*:*:*:*:*cpe:2.3:a:oracle:communications_diameter_signaling_router:*:*:*:*:*:*:*:* ≥ 8.0.0.0 ≤ 8.5.0.2cpe:2.3:a:oracle:communications_instant_messaging_server:10.0.1.5.0:*:*:*:*:*:*:*cpe:2.3:a:oracle:communications_policy_management:12.5.0:*:*:*:*:*:*:*cpe:2.3:a:oracle:communications_pricing_design_center:12.0.0.3.0:*:*:*:*:*:*:*cpe:2.3:a:oracle:communications_session_report_manager:*:*:*:*:*:*:*:* ≥ 8.0.0 ≤ 8.2.4.0cpe:2.3:a:oracle:communications_session_route_manager:*:*:*:*:*:*:*:* ≥ 8.0.0 ≤ 8.2.4cpe:2.3:a:oracle:graph_server_and_client:*:*:*:*:*:*:*:* < 21.4cpe:2.3:a:oracle:healthcare_translational_research:4.1.0:*:*:*:*:*:*:*cpe:2.3:a:oracle:hospitality_cruise_shipboard_property_management_system:20.1.0:*:*:*:*:*:*:*cpe:2.3:a:oracle:instantis_enterprisetrack:17.1:*:*:*:*:*:*:*cpe:2.3:a:oracle:instantis_enterprisetrack:17.2:*:*:*:*:*:*:*cpe:2.3:a:oracle:instantis_enterprisetrack:17.3:*:*:*:*:*:*:*cpe:2.3:a:oracle:managed_file_transfer:12.2.1.3.0:*:*:*:*:*:*:*cpe:2.3:a:oracle:managed_file_transfer:12.2.1.4.0:*:*:*:*:*:*:*cpe:2.3:a:oracle:mysql_enterprise_monitor:*:*:*:*:*:*:*:* ≤ 8.0.25cpe:2.3:a:oracle:sd-wan_edge:9.0:*:*:*:*:*:*:*cpe:2.3:a:oracle:sd-wan_edge:9.1:*:*:*:*:*:*:*cpe:2.3:a:oracle:secure_global_desktop:5.6:*:*:*:*:*:*:*cpe:2.3:a:oracle:utilities_testing_accelerator:6.0.0.1.1:*:*:*:*:*:*:*cpe:2.3:a:oracle:utilities_testing_accelerator:6.0.0.2.2:*:*:*:*:*:*:*cpe:2.3:a:oracle:utilities_testing_accelerator:6.0.0.3.1:*:*:*:*:*:*:*cpe:2.3:a:mcafee:epolicy_orchestrator:*:*:*:*:*:*:*:* < 5.10.0cpe:2.3:a:mcafee:epolicy_orchestrator:5.10.0:-:*:*:*:*:*:*cpe:2.3:a:mcafee:epolicy_orchestrator:5.10.0:update_1:*:*:*:*:*:*cpe:2.3:a:mcafee:epolicy_orchestrator:5.10.0:update_10:*:*:*:*:*:*cpe:2.3:a:mcafee:epolicy_orchestrator:5.10.0:update_2:*:*:*:*:*:*cpe:2.3:a:mcafee:epolicy_orchestrator:5.10.0:update_3:*:*:*:*:*:*cpe:2.3:a:mcafee:epolicy_orchestrator:5.10.0:update_4:*:*:*:*:*:*cpe:2.3:a:mcafee:epolicy_orchestrator:5.10.0:update_5:*:*:*:*:*:*cpe:2.3:a:mcafee:epolicy_orchestrator:5.10.0:update_6:*:*:*:*:*:*cpe:2.3:a:mcafee:epolicy_orchestrator:5.10.0:update_7:*:*:*:*:*:*+2 more Affected products
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