{"answers":{"affected":"9 open source packages ship an affected version, including org.apache.tomcat.embed:tomcat-embed-core, tomcat and org.apache.tomcat:tomcat-coyote. It affects 12 products.","exploited":"There is no known exploitation of CVE-2021-25122 in the wild and no public exploit code.","fix":"Upgrade org.apache.tomcat.embed:tomcat-embed-core to a fixed version for your release line: 10.0.2, 8.5.63 or 9.0.43.","what":"CVE-2021-25122 is a high-severity vulnerability in Apache Tomcat, published on 1 Mar 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-2021-25122 and fix it if it is affected.\n\nWhat it is: CVE-2021-25122 is a high-severity vulnerability in Apache Tomcat, published on 1 Mar 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-2021-25122 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- org.apache.tomcat.embed:tomcat-embed-core (Maven): affected from 10.0.0-M1; fixed in 10.0.2\n- org.apache.tomcat.embed:tomcat-embed-core (Maven): affected from 10.0.0-M1; fixed in 10.0.2\n- org.apache.tomcat.embed:tomcat-embed-core (Maven): affected from 8.5.0; fixed in 8.5.63\n- org.apache.tomcat.embed:tomcat-embed-core (Maven): affected from 8.5.0; fixed in 8.5.63\n- org.apache.tomcat.embed:tomcat-embed-core (Maven): affected from 9.0.0-M1; fixed in 9.0.43\n- org.apache.tomcat.embed:tomcat-embed-core (Maven): affected from 9.0.0-M1; fixed in 9.0.43\n- tomcat (Bitnami): affected from 8.5.0; fixed in 8.5.62, 9.0.42, 10.0.1\n- org.apache.tomcat:tomcat-coyote (Maven): affected from 10.0.0-M1; fixed in 10.0.2\n- org.apache.tomcat:tomcat-coyote (Maven): affected from 10.0.0-M1; fixed in 10.0.2\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-2021-25122/ (Markdown: https://insights.sbomify.com/CVE-2021-25122/index.md)","id":"CVE-2021-25122","markdown":"https://insights.sbomify.com/CVE-2021-25122/index.md","name":"CVE-2021-25122","record":{"aliases":["BIT-tomcat-2021-25122","DEBIAN-CVE-2021-25122","GHSA-j39c-c8hj-x4j3","ROOT-APP-MAVEN-CVE-2021-25122","UBUNTU-CVE-2021-25122"],"analysis":{"component_type":"server_software","fix_type":"upgrade","impacts":["data_read"],"network_reachable":"yes","non_default_config":false,"product_category":"Apache Tomcat","requires_auth":"none","summary":"Apache Tomcat may leak request headers and body data between users during h2c connection handling, allowing one user to see another's request details.","user_interaction":"not_required","vuln_class":"information_disclosure"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"apache","cpe":[{"product":"tomcat","vendor":"apache"},{"product":"debian_linux","vendor":"debian"},{"product":"agile_product_lifecycle_management","vendor":"oracle"},{"product":"communications_cloud_native_core_policy","vendor":"oracle"},{"product":"communications_cloud_native_core_security_edge_protection_proxy","vendor":"oracle"},{"product":"communications_instant_messaging_server","vendor":"oracle"},{"product":"database","vendor":"oracle"},{"product":"graph_server_and_client","vendor":"oracle"},{"product":"instantis_enterprisetrack","vendor":"oracle"},{"product":"managed_file_transfer","vendor":"oracle"},{"product":"mysql_enterprise_monitor","vendor":"oracle"},{"product":"siebel_ui_framework","vendor":"oracle"}],"cvss":{"score":7.5,"severity":"high","source":"nvd","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","version":"3.1"},"cwes":[{"id":"CWE-200","name":"Exposure of Sensitive Information to an Unauthorized Actor"}],"description":"When responding to new h2c connection requests, Apache Tomcat versions 10.0.0-M1 to 10.0.0, 9.0.0.M1 to 9.0.41 and 8.5.0 to 8.5.61 could duplicate request headers and a limited amount of request body from one request to another meaning user A and user B could both see the results of user A's request.","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":"Apache Tomcat h2c request mix-up","id":"CVE-2021-25122","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"Bitnami","product":"apache:tomcat","products":["apache:tomcat","debian:debian_linux","oracle:agile_product_lifecycle_management","oracle:communications_cloud_native_core_policy","oracle:communications_instant_messaging_server","oracle:database","oracle:instantis_enterprisetrack","oracle:mysql_enterprise_monitor","oracle:siebel_ui_framework"],"type":"information_disclosure","year":"2021"},"n_packages":9,"n_references":16,"next":{"headline":"Memory corruption in HPE Cloudline CL5800 Gen9 Server; HPE Cloudline CL5200 Gen9 Server; HPE Cloudline CL4100 Gen10 Server; HPE Cloudline CL3100 Gen10 Server; HPE Cloudline CL5800 Gen10 Server","id":"CVE-2021-25123"},"packages":[{"ecosystem":"Bitnami","fixed":["8.5.62","9.0.42","10.0.1"],"introduced":["8.5.0","9.0.0","10.0.0"],"last_affected":[],"package":"tomcat","purl":"pkg:bitnami/tomcat","source":"BIT-tomcat-2021-25122"},{"ecosystem":"Maven","fixed":["10.0.2"],"introduced":["10.0.0-M1"],"last_affected":[],"package":"org.apache.tomcat.embed:tomcat-embed-core","purl":null,"source":"GHSA-j39c-c8hj-x4j3"},{"ecosystem":"Maven","fixed":["10.0.2"],"introduced":["10.0.0-M1"],"last_affected":[],"package":"org.apache.tomcat.embed:tomcat-embed-core","purl":"pkg:maven/org.apache.tomcat.embed/tomcat-embed-core","source":"GHSA-j39c-c8hj-x4j3"},{"ecosystem":"Maven","fixed":["8.5.63"],"introduced":["8.5.0"],"last_affected":[],"package":"org.apache.tomcat.embed:tomcat-embed-core","purl":null,"source":"GHSA-j39c-c8hj-x4j3"},{"ecosystem":"Maven","fixed":["8.5.63"],"introduced":["8.5.0"],"last_affected":[],"package":"org.apache.tomcat.embed:tomcat-embed-core","purl":"pkg:maven/org.apache.tomcat.embed/tomcat-embed-core","source":"GHSA-j39c-c8hj-x4j3"},{"ecosystem":"Maven","fixed":["9.0.43"],"introduced":["9.0.0-M1"],"last_affected":[],"package":"org.apache.tomcat.embed:tomcat-embed-core","purl":null,"source":"GHSA-j39c-c8hj-x4j3"},{"ecosystem":"Maven","fixed":["9.0.43"],"introduced":["9.0.0-M1"],"last_affected":[],"package":"org.apache.tomcat.embed:tomcat-embed-core","purl":"pkg:maven/org.apache.tomcat.embed/tomcat-embed-core","source":"GHSA-j39c-c8hj-x4j3"},{"ecosystem":"Maven","fixed":["10.0.2"],"introduced":["10.0.0-M1"],"last_affected":[],"package":"org.apache.tomcat:tomcat-coyote","purl":null,"source":"GHSA-j39c-c8hj-x4j3"},{"ecosystem":"Maven","fixed":["10.0.2"],"introduced":["10.0.0-M1"],"last_affected":[],"package":"org.apache.tomcat:tomcat-coyote","purl":"pkg:maven/org.apache.tomcat/tomcat-coyote","source":"GHSA-j39c-c8hj-x4j3"}],"prev":{"headline":"Rating by BestWebSoft \u003c 1.6 - Rating Denial of Service","id":"CVE-2021-25121"},"products":["Apache Tomcat"],"published":"2021-03-01","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":"Apache Tomcat may leak request headers and body data between users during h2c connection handling, allowing one user to see another's request details.","url":"https://insights.sbomify.com/CVE-2021-25122/"}