{"answers":{"affected":"7 open source packages ship an affected version, including org.apache.tomcat:tomcat and tomcat. It affects 22 products.","exploited":"There is no known exploitation of CVE-2021-33037 in the wild and no public exploit code.","fix":"Upgrade org.apache.tomcat:tomcat to a fixed version for your release line: 10.0.7, 8.5.68 or 9.0.48.","what":"CVE-2021-33037 is a medium-severity vulnerability in Apache Tomcat, published on 12 Jul 2021. An attacker can exploit it over the internet without logging in, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2021-33037 and fix it if it is affected.\n\nWhat it is: CVE-2021-33037 is a medium-severity vulnerability in Apache Tomcat, published on 12 Jul 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2021-33037 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- org.apache.tomcat:tomcat (Maven): affected from 10.0.0-M1; fixed in 10.0.7\n- org.apache.tomcat:tomcat (Maven): affected from 10.0.0-M1; fixed in 10.0.7\n- org.apache.tomcat:tomcat (Maven): affected from 8.5.0; fixed in 8.5.68\n- org.apache.tomcat:tomcat (Maven): affected from 8.5.0; fixed in 8.5.68\n- org.apache.tomcat:tomcat (Maven): affected from 9.0.0-M1; fixed in 9.0.48\n- org.apache.tomcat:tomcat (Maven): affected from 9.0.0-M1; fixed in 9.0.48\n- tomcat (Bitnami): affected from 8.5.0; fixed in 8.5.67, 9.0.47, 10.0.7\n\nTask:\n1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.\n2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.\n3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.\n4. Run the tests and summarise what changed and why.\n5. If nothing in the project is affected, say so and change nothing.\n\nReference: https://insights.sbomify.com/CVE-2021-33037/ (Markdown: https://insights.sbomify.com/CVE-2021-33037/index.md)","id":"CVE-2021-33037","markdown":"https://insights.sbomify.com/CVE-2021-33037/index.md","name":"CVE-2021-33037","record":{"aliases":["BIT-tomcat-2021-33037","DEBIAN-CVE-2021-33037","GHSA-4vww-mc66-62m6","OESA-2021-1275","UBUNTU-CVE-2021-33037"],"analysis":{"component_type":"server_software","fix_type":"upgrade","impacts":["security_bypass"],"network_reachable":"yes","non_default_config":false,"product_category":"Apache Tomcat","requires_auth":"none","summary":"Attackers can perform HTTP request smuggling against Apache Tomcat when used with a reverse proxy due to incorrect Transfer-Encoding header parsing.","user_interaction":"not_required","vuln_class":"other"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"apache","cpe":[{"product":"tomcat","vendor":"apache"},{"product":"tomee","vendor":"apache"},{"product":"debian_linux","vendor":"debian"},{"product":"epolicy_orchestrator","vendor":"mcafee"},{"product":"agile_product_lifecycle_management","vendor":"oracle"},{"product":"communications_cloud_native_core_policy","vendor":"oracle"},{"product":"communications_cloud_native_core_service_communication_proxy","vendor":"oracle"},{"product":"communications_diameter_signaling_router","vendor":"oracle"},{"product":"communications_instant_messaging_server","vendor":"oracle"},{"product":"communications_policy_management","vendor":"oracle"},{"product":"communications_pricing_design_center","vendor":"oracle"},{"product":"communications_session_report_manager","vendor":"oracle"},{"product":"communications_session_route_manager","vendor":"oracle"},{"product":"graph_server_and_client","vendor":"oracle"},{"product":"healthcare_translational_research","vendor":"oracle"},{"product":"hospitality_cruise_shipboard_property_management_system","vendor":"oracle"},{"product":"instantis_enterprisetrack","vendor":"oracle"},{"product":"managed_file_transfer","vendor":"oracle"},{"product":"mysql_enterprise_monitor","vendor":"oracle"},{"product":"sd-wan_edge","vendor":"oracle"},{"product":"secure_global_desktop","vendor":"oracle"},{"product":"utilities_testing_accelerator","vendor":"oracle"}],"cvss":{"score":5.3,"severity":"medium","source":"nvd","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N","version":"3.1"},"cwes":[{"id":"CWE-444","name":"Inconsistent Interpretation of HTTP Requests"}],"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.","ecosystems":["Bitnami","Maven"],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":true,"headline":"Incorrect Transfer-Encoding handling with HTTP/1.0","id":"CVE-2021-33037","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"Bitnami","product":"apache:tomcat","products":["apache:tomcat","debian:debian_linux","mcafee:epolicy_orchestrator","oracle:agile_product_lifecycle_management","oracle:communications_cloud_native_core_policy","oracle:communications_diameter_signaling_router","oracle:communications_instant_messaging_server","oracle:communications_policy_management","oracle:communications_session_report_manager","oracle:communications_session_route_manager","oracle:instantis_enterprisetrack","oracle:mysql_enterprise_monitor"],"type":"other","year":"2021"},"n_packages":7,"n_references":16,"next":{"headline":"Exposure of sensitive information to an unauthorized actor in HyperKitty","id":"CVE-2021-33038"},"packages":[{"ecosystem":"Bitnami","fixed":["8.5.67","9.0.47","10.0.7"],"introduced":["8.5.0","9.0.0","10.0.0"],"last_affected":[],"package":"tomcat","purl":"pkg:bitnami/tomcat","source":"BIT-tomcat-2021-33037"},{"ecosystem":"Maven","fixed":["10.0.7"],"introduced":["10.0.0-M1"],"last_affected":[],"package":"org.apache.tomcat:tomcat","purl":null,"source":"GHSA-4vww-mc66-62m6"},{"ecosystem":"Maven","fixed":["10.0.7"],"introduced":["10.0.0-M1"],"last_affected":[],"package":"org.apache.tomcat:tomcat","purl":"pkg:maven/org.apache.tomcat/tomcat","source":"GHSA-4vww-mc66-62m6"},{"ecosystem":"Maven","fixed":["8.5.68"],"introduced":["8.5.0"],"last_affected":[],"package":"org.apache.tomcat:tomcat","purl":null,"source":"GHSA-4vww-mc66-62m6"},{"ecosystem":"Maven","fixed":["8.5.68"],"introduced":["8.5.0"],"last_affected":[],"package":"org.apache.tomcat:tomcat","purl":"pkg:maven/org.apache.tomcat/tomcat","source":"GHSA-4vww-mc66-62m6"},{"ecosystem":"Maven","fixed":["9.0.48"],"introduced":["9.0.0-M1"],"last_affected":[],"package":"org.apache.tomcat:tomcat","purl":null,"source":"GHSA-4vww-mc66-62m6"},{"ecosystem":"Maven","fixed":["9.0.48"],"introduced":["9.0.0-M1"],"last_affected":[],"package":"org.apache.tomcat:tomcat","purl":"pkg:maven/org.apache.tomcat/tomcat","source":"GHSA-4vww-mc66-62m6"}],"prev":{"headline":"Apache Hadoop Privilege escalation vulnerability","id":"CVE-2021-33036"},"products":["Apache Tomcat"],"published":"2021-07-12","related":[{"cvss_score":10,"headline":"Apache Tomcat Path Equivalence","id":"CVE-2025-24813","kev_date_added":"2025-04-01","published":"2025-03-10"},{"cvss_score":9.8,"headline":"Apache Tomcat Remote Code Execution","id":"CVE-2016-8735","kev_date_added":"2023-05-12","published":"2017-04-06"},{"cvss_score":8.1,"headline":"Apache Tomcat Remote Code Execution","id":"CVE-2017-12617","kev_date_added":"2022-03-25","published":"2017-10-03"},{"cvss_score":8.1,"headline":"Apache Tomcat on Windows Remote Code Execution","id":"CVE-2017-12615","kev_date_added":"2022-03-25","published":"2017-09-19"},{"cvss_score":7.5,"headline":"Apache Tomcat Missing Encryption of Sensitive Data","id":"CVE-2026-34486","kev_date_added":"2026-08-04","published":"2026-04-09"},{"cvss_score":9.8,"headline":"Apache Tomcat: HTTP/2 no-authority bypass of strict SNI validation - CVE-2026-32990 fix incomplete","id":"CVE-2026-65637","kev_date_added":null,"published":"2026-08-25"},{"cvss_score":9.8,"headline":"Apache Tomcat: Limited replay attack possible with DIGEST authentication","id":"CVE-2026-65905","kev_date_added":null,"published":"2026-08-25"}],"sources":[{"class":"attribution","licence":"Apache-2.0","name":"Bitnami","prefix":"BIT"},{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"CC BY 4.0","name":"GitHub Advisory Database","prefix":"GHSA"},{"class":"attribution","licence":"US public information, NVD API terms","name":"NVD"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":"yes","exploitation":"none","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-10-08","vendors":["Apache Software Foundation"]},"summary":"Attackers can perform HTTP request smuggling against Apache Tomcat when used with a reverse proxy due to incorrect Transfer-Encoding header parsing.","url":"https://insights.sbomify.com/CVE-2021-33037/"}