{"answers":{"affected":"7 open source packages ship an affected version, including org.apache.tomcat:tomcat and tomcat. It affects 7 products.","exploited":"There is no known exploitation of CVE-2021-30640 in the wild and no public exploit code.","fix":"Upgrade org.apache.tomcat:tomcat to a fixed version for your release line: 10.0.5, 8.5.65 or 9.0.45.","what":"CVE-2021-30640 is a medium-severity authentication bypass 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-2021-30640 and fix it if it is affected.\n\nWhat it is: CVE-2021-30640 is a medium-severity authentication bypass 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-2021-30640 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 10.0.5\n- org.apache.tomcat:tomcat (Maven): affected from 10.0.0-M1; fixed in 10.0.5\n- org.apache.tomcat:tomcat (Maven): affected from 8.5.0; fixed in 8.5.65\n- org.apache.tomcat:tomcat (Maven): affected from 8.5.0; fixed in 8.5.65\n- org.apache.tomcat:tomcat (Maven): affected from 9.0.0M1; fixed in 9.0.45\n- org.apache.tomcat:tomcat (Maven): affected from 9.0.0M1; fixed in 9.0.45\n- tomcat (Bitnami): affected from 7.0.0; fixed in 7.0.109, 8.5.66, 9.0.46, 10.0.6\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-2021-30640/ (Markdown: https://insights.sbomify.com/CVE-2021-30640/index.md)","id":"CVE-2021-30640","markdown":"https://insights.sbomify.com/CVE-2021-30640/index.md","name":"CVE-2021-30640","record":{"aliases":["BIT-tomcat-2021-30640","DEBIAN-CVE-2021-30640","GHSA-36qh-35cm-5w2w","OESA-2021-1299","UBUNTU-CVE-2021-30640"],"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 bypass authentication or lockout protections in Apache Tomcat by manipulating JNDI Realm username variations.","user_interaction":"not_required","vuln_class":"auth_bypass"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"apache","cpe":[{"product":"tomcat","vendor":"apache"},{"product":"debian_linux","vendor":"debian"},{"product":"communications_cloud_native_core_policy","vendor":"oracle"},{"product":"communications_diameter_signaling_router","vendor":"oracle"},{"product":"communications_pricing_design_center","vendor":"oracle"},{"product":"hospitality_cruise_shipboard_property_management_system","vendor":"oracle"},{"product":"tekelec_platform_distribution","vendor":"oracle"}],"cvss":{"score":6.5,"severity":"medium","source":"nvd","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:H/A:N","version":"3.1"},"cwes":[{"id":"CWE-116","name":"Improper Encoding or Escaping of Output"}],"description":"A vulnerability in the JNDI Realm of Apache Tomcat allows an attacker to authenticate using variations of a valid user name and/or to bypass some of the protection provided by the LockOut Realm. This issue affects Apache Tomcat 10.0.0-M1 to 10.0.5; 9.0.0.M1 to 9.0.45; 8.5.0 to 8.5.65.","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":"Auth weakness in JNDIRealm","id":"CVE-2021-30640","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"Bitnami","product":"apache:tomcat","products":["apache:tomcat","debian:debian_linux","oracle:communications_cloud_native_core_policy","oracle:communications_diameter_signaling_router"],"type":"auth_bypass","year":"2021"},"n_packages":7,"n_references":9,"next":{"headline":"Unexpected URL matching with 'MergeSlashes OFF'","id":"CVE-2021-30641"},"packages":[{"ecosystem":"Bitnami","fixed":["7.0.109","8.5.66","9.0.46","10.0.6"],"introduced":["7.0.0","8.5.0","9.0.0","10.0.0"],"last_affected":[],"package":"tomcat","purl":"pkg:bitnami/tomcat","source":"BIT-tomcat-2021-30640"},{"ecosystem":"Maven","fixed":["10.0.5"],"introduced":["10.0.0-M1"],"last_affected":[],"package":"org.apache.tomcat:tomcat","purl":null,"source":"GHSA-36qh-35cm-5w2w"},{"ecosystem":"Maven","fixed":["10.0.5"],"introduced":["10.0.0-M1"],"last_affected":[],"package":"org.apache.tomcat:tomcat","purl":"pkg:maven/org.apache.tomcat/tomcat","source":"GHSA-36qh-35cm-5w2w"},{"ecosystem":"Maven","fixed":["8.5.65"],"introduced":["8.5.0"],"last_affected":[],"package":"org.apache.tomcat:tomcat","purl":null,"source":"GHSA-36qh-35cm-5w2w"},{"ecosystem":"Maven","fixed":["8.5.65"],"introduced":["8.5.0"],"last_affected":[],"package":"org.apache.tomcat:tomcat","purl":"pkg:maven/org.apache.tomcat/tomcat","source":"GHSA-36qh-35cm-5w2w"},{"ecosystem":"Maven","fixed":["9.0.45"],"introduced":["9.0.0M1"],"last_affected":[],"package":"org.apache.tomcat:tomcat","purl":null,"source":"GHSA-36qh-35cm-5w2w"},{"ecosystem":"Maven","fixed":["9.0.45"],"introduced":["9.0.0M1"],"last_affected":[],"package":"org.apache.tomcat:tomcat","purl":"pkg:maven/org.apache.tomcat/tomcat","source":"GHSA-36qh-35cm-5w2w"}],"prev":{"headline":"DoS after non-blocking IO error","id":"CVE-2021-30639"},"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 bypass authentication or lockout protections in Apache Tomcat by manipulating JNDI Realm username variations.","url":"https://insights.sbomify.com/CVE-2021-30640/"}