{"answers":{"affected":"19 open source packages ship an affected version, including org.apache.tomcat.embed:tomcat-embed-core, tomcat and org.apache.tomcat:tomcat. It affects 1 product.","exploited":"There is no known exploitation of CVE-2026-43513 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: 9.0.118, 10.1.55 or 11.0.22.","what":"CVE-2026-43513 is a high-severity authentication bypass vulnerability in Apache Tomcat, published on 12 May 2026. An attacker can exploit it over the internet without logging in, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-43513 and fix it if it is affected.\n\nWhat it is: CVE-2026-43513 is a high-severity authentication bypass vulnerability in Apache Tomcat, published on 12 May 2026. 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-2026-43513 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- org.apache.tomcat.embed:tomcat-embed-core (Maven): affected all versions; fixed in 9.0.118\n- org.apache.tomcat.embed:tomcat-embed-core (Maven): affected all versions; fixed in 9.0.118\n- org.apache.tomcat.embed:tomcat-embed-core (Maven): affected from 10.1.0-M1; fixed in 10.1.55\n- org.apache.tomcat.embed:tomcat-embed-core (Maven): affected from 10.1.0-M1; fixed in 10.1.55\n- org.apache.tomcat.embed:tomcat-embed-core (Maven): affected from 11.0.0-M1; fixed in 11.0.22\n- org.apache.tomcat.embed:tomcat-embed-core (Maven): affected from 11.0.0-M1; fixed in 11.0.22\n- tomcat (Bitnami): affected from 10.0.0; fixed in 10.1.55, 11.0.22, 9.0.118\n- org.apache.tomcat:tomcat (Maven): affected all versions; fixed in 9.0.118\n- org.apache.tomcat:tomcat (Maven): affected all versions; fixed in 9.0.118\n- org.apache.tomcat:tomcat (Maven): affected from 10.1.0-M1; fixed in 10.1.55\n- org.apache.tomcat:tomcat (Maven): affected from 10.1.0-M1; fixed in 10.1.55\n- org.apache.tomcat:tomcat (Maven): affected from 11.0.0-M1; fixed in 11.0.22\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-2026-43513/ (Markdown: https://insights.sbomify.com/CVE-2026-43513/index.md)","id":"CVE-2026-43513","markdown":"https://insights.sbomify.com/CVE-2026-43513/index.md","name":"CVE-2026-43513","record":{"aliases":["BIT-tomcat-2026-43513","CLEANSTART-2026-MU35489","CLEANSTART-2026-VA89845","DEBIAN-CVE-2026-43513","GHSA-5mp6-jrq3-r938","MINI-wwr9-2xmf-9g4w","RHSA-2026:44426","RHSA-2026:44427","ROOT-APP-MAVEN-CVE-2026-43513","UBUNTU-CVE-2026-43513"],"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 account lockout mechanisms by exploiting case sensitivity in user names, allowing continued brute-force attempts against locked accounts.","user_interaction":"not_required","vuln_class":"auth_bypass"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"apache","cpe":[{"product":"tomcat","vendor":"apache"}],"cvss":{"score":7.5,"severity":"high","source":"cisa-adp","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-178","name":"Improper Handling of Case Sensitivity"}],"description":"Improper Handling of Case Sensitivity vulnerability in LockOutRealm in Apache Tomcat.\n\nThis issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.21, from 10.1.0-M1 through 10.1.54, from 9.0.0.M1 through 9.0.117, from 8.5.0 through 8.5.100, from 7.0.0 through 7.0.109.\nOlder unsupported versions may also be affected.\n\nUsers are recommended to upgrade to version 11.0.22, 10.1.55 or 9.0.118 which fix the issue.","ecosystems":["Bitnami","Maven","Red Hat:hummingbird:1"],"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: LockOutRealm treats user names as case-sensitive","id":"CVE-2026-43513","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"Bitnami","product":"apache:tomcat","products":["apache:tomcat"],"type":"auth_bypass","year":"2026"},"n_packages":39,"n_references":1,"next":{"headline":"Apache Tomcat: AJP secret compared in non-constant time","id":"CVE-2026-43514"},"packages":[{"ecosystem":"Bitnami","fixed":["10.1.55","11.0.22","9.0.118"],"introduced":["10.0.0","11.0.0","9.0.0"],"last_affected":[],"package":"tomcat","purl":"pkg:bitnami/tomcat","source":"BIT-tomcat-2026-43513"},{"ecosystem":"Maven","fixed":["9.0.118"],"introduced":["0"],"last_affected":[],"package":"org.apache.tomcat.embed:tomcat-embed-core","purl":null,"source":"GHSA-5mp6-jrq3-r938"},{"ecosystem":"Maven","fixed":["9.0.118"],"introduced":["0"],"last_affected":[],"package":"org.apache.tomcat.embed:tomcat-embed-core","purl":"pkg:maven/org.apache.tomcat.embed/tomcat-embed-core","source":"GHSA-5mp6-jrq3-r938"},{"ecosystem":"Maven","fixed":["10.1.55"],"introduced":["10.1.0-M1"],"last_affected":[],"package":"org.apache.tomcat.embed:tomcat-embed-core","purl":null,"source":"GHSA-5mp6-jrq3-r938"},{"ecosystem":"Maven","fixed":["10.1.55"],"introduced":["10.1.0-M1"],"last_affected":[],"package":"org.apache.tomcat.embed:tomcat-embed-core","purl":"pkg:maven/org.apache.tomcat.embed/tomcat-embed-core","source":"GHSA-5mp6-jrq3-r938"},{"ecosystem":"Maven","fixed":["11.0.22"],"introduced":["11.0.0-M1"],"last_affected":[],"package":"org.apache.tomcat.embed:tomcat-embed-core","purl":null,"source":"GHSA-5mp6-jrq3-r938"},{"ecosystem":"Maven","fixed":["11.0.22"],"introduced":["11.0.0-M1"],"last_affected":[],"package":"org.apache.tomcat.embed:tomcat-embed-core","purl":"pkg:maven/org.apache.tomcat.embed/tomcat-embed-core","source":"GHSA-5mp6-jrq3-r938"},{"ecosystem":"Maven","fixed":["9.0.118"],"introduced":["0"],"last_affected":[],"package":"org.apache.tomcat:tomcat","purl":null,"source":"GHSA-5mp6-jrq3-r938"},{"ecosystem":"Maven","fixed":["9.0.118"],"introduced":["0"],"last_affected":[],"package":"org.apache.tomcat:tomcat","purl":"pkg:maven/org.apache.tomcat/tomcat","source":"GHSA-5mp6-jrq3-r938"},{"ecosystem":"Maven","fixed":["10.1.55"],"introduced":["10.1.0-M1"],"last_affected":[],"package":"org.apache.tomcat:tomcat","purl":null,"source":"GHSA-5mp6-jrq3-r938"},{"ecosystem":"Maven","fixed":["10.1.55"],"introduced":["10.1.0-M1"],"last_affected":[],"package":"org.apache.tomcat:tomcat","purl":"pkg:maven/org.apache.tomcat/tomcat","source":"GHSA-5mp6-jrq3-r938"},{"ecosystem":"Maven","fixed":["11.0.22"],"introduced":["11.0.0-M1"],"last_affected":[],"package":"org.apache.tomcat:tomcat","purl":null,"source":"GHSA-5mp6-jrq3-r938"},{"ecosystem":"Maven","fixed":["11.0.22"],"introduced":["11.0.0-M1"],"last_affected":[],"package":"org.apache.tomcat:tomcat","purl":"pkg:maven/org.apache.tomcat/tomcat","source":"GHSA-5mp6-jrq3-r938"},{"ecosystem":"Maven","fixed":["9.0.118"],"introduced":["0"],"last_affected":[],"package":"org.apache.tomcat:tomcat-catalina","purl":null,"source":"GHSA-5mp6-jrq3-r938"},{"ecosystem":"Maven","fixed":["9.0.118"],"introduced":["0"],"last_affected":[],"package":"org.apache.tomcat:tomcat-catalina","purl":"pkg:maven/org.apache.tomcat/tomcat-catalina","source":"GHSA-5mp6-jrq3-r938"},{"ecosystem":"Maven","fixed":["10.1.55"],"introduced":["10.1.0-M1"],"last_affected":[],"package":"org.apache.tomcat:tomcat-catalina","purl":null,"source":"GHSA-5mp6-jrq3-r938"},{"ecosystem":"Maven","fixed":["10.1.55"],"introduced":["10.1.0-M1"],"last_affected":[],"package":"org.apache.tomcat:tomcat-catalina","purl":"pkg:maven/org.apache.tomcat/tomcat-catalina","source":"GHSA-5mp6-jrq3-r938"},{"ecosystem":"Maven","fixed":["11.0.22"],"introduced":["11.0.0-M1"],"last_affected":[],"package":"org.apache.tomcat:tomcat-catalina","purl":null,"source":"GHSA-5mp6-jrq3-r938"},{"ecosystem":"Maven","fixed":["11.0.22"],"introduced":["11.0.0-M1"],"last_affected":[],"package":"org.apache.tomcat:tomcat-catalina","purl":"pkg:maven/org.apache.tomcat/tomcat-catalina","source":"GHSA-5mp6-jrq3-r938"},{"ecosystem":"Red Hat:hummingbird:1","fixed":["0:10.1.57-3.1.hum1"],"introduced":["0"],"last_affected":[],"package":"tomcat10","purl":"pkg:rpm/redhat/tomcat10","source":"RHSA-2026:44426"},{"ecosystem":"Red Hat:hummingbird:1","fixed":["0:10.1.57-3.1.hum1"],"introduced":["0"],"last_affected":[],"package":"tomcat10-admin-webapps","purl":"pkg:rpm/redhat/tomcat10-admin-webapps","source":"RHSA-2026:44426"},{"ecosystem":"Red Hat:hummingbird:1","fixed":["0:10.1.57-3.1.hum1"],"introduced":["0"],"last_affected":[],"package":"tomcat10-common","purl":"pkg:rpm/redhat/tomcat10-common","source":"RHSA-2026:44426"},{"ecosystem":"Red Hat:hummingbird:1","fixed":["0:10.1.57-3.1.hum1"],"introduced":["0"],"last_affected":[],"package":"tomcat10-docs-webapp","purl":"pkg:rpm/redhat/tomcat10-docs-webapp","source":"RHSA-2026:44426"},{"ecosystem":"Red Hat:hummingbird:1","fixed":["0:10.1.57-3.1.hum1"],"introduced":["0"],"last_affected":[],"package":"tomcat10-el-5.0-api","purl":"pkg:rpm/redhat/tomcat10-el-5.0-api","source":"RHSA-2026:44426"},{"ecosystem":"Red Hat:hummingbird:1","fixed":["0:10.1.57-3.1.hum1"],"introduced":["0"],"last_affected":[],"package":"tomcat10-jsp-3.1-api","purl":"pkg:rpm/redhat/tomcat10-jsp-3.1-api","source":"RHSA-2026:44426"},{"ecosystem":"Red Hat:hummingbird:1","fixed":["0:10.1.57-3.1.hum1"],"introduced":["0"],"last_affected":[],"package":"tomcat10-lib","purl":"pkg:rpm/redhat/tomcat10-lib","source":"RHSA-2026:44426"},{"ecosystem":"Red Hat:hummingbird:1","fixed":["0:10.1.57-3.1.hum1"],"introduced":["0"],"last_affected":[],"package":"tomcat10-servlet-6.0-api","purl":"pkg:rpm/redhat/tomcat10-servlet-6.0-api","source":"RHSA-2026:44426"},{"ecosystem":"Red Hat:hummingbird:1","fixed":["0:10.1.57-3.1.hum1"],"introduced":["0"],"last_affected":[],"package":"tomcat10-user-instance","purl":"pkg:rpm/redhat/tomcat10-user-instance","source":"RHSA-2026:44426"},{"ecosystem":"Red Hat:hummingbird:1","fixed":["0:10.1.57-3.1.hum1"],"introduced":["0"],"last_affected":[],"package":"tomcat10-webapps","purl":"pkg:rpm/redhat/tomcat10-webapps","source":"RHSA-2026:44426"},{"ecosystem":"Red Hat:hummingbird:1","fixed":["0:11.0.24-0.2.hum1"],"introduced":["0"],"last_affected":[],"package":"tomcat11","purl":"pkg:rpm/redhat/tomcat11","source":"RHSA-2026:44427"},{"ecosystem":"Red Hat:hummingbird:1","fixed":["0:11.0.24-0.2.hum1"],"introduced":["0"],"last_affected":[],"package":"tomcat11-admin-webapps","purl":"pkg:rpm/redhat/tomcat11-admin-webapps","source":"RHSA-2026:44427"},{"ecosystem":"Red Hat:hummingbird:1","fixed":["0:11.0.24-0.2.hum1"],"introduced":["0"],"last_affected":[],"package":"tomcat11-common","purl":"pkg:rpm/redhat/tomcat11-common","source":"RHSA-2026:44427"},{"ecosystem":"Red Hat:hummingbird:1","fixed":["0:11.0.24-0.2.hum1"],"introduced":["0"],"last_affected":[],"package":"tomcat11-docs-webapp","purl":"pkg:rpm/redhat/tomcat11-docs-webapp","source":"RHSA-2026:44427"},{"ecosystem":"Red Hat:hummingbird:1","fixed":["0:11.0.24-0.2.hum1"],"introduced":["0"],"last_affected":[],"package":"tomcat11-el-6.0-api","purl":"pkg:rpm/redhat/tomcat11-el-6.0-api","source":"RHSA-2026:44427"},{"ecosystem":"Red Hat:hummingbird:1","fixed":["0:11.0.24-0.2.hum1"],"introduced":["0"],"last_affected":[],"package":"tomcat11-jsp-4.0-api","purl":"pkg:rpm/redhat/tomcat11-jsp-4.0-api","source":"RHSA-2026:44427"},{"ecosystem":"Red Hat:hummingbird:1","fixed":["0:11.0.24-0.2.hum1"],"introduced":["0"],"last_affected":[],"package":"tomcat11-lib","purl":"pkg:rpm/redhat/tomcat11-lib","source":"RHSA-2026:44427"},{"ecosystem":"Red Hat:hummingbird:1","fixed":["0:11.0.24-0.2.hum1"],"introduced":["0"],"last_affected":[],"package":"tomcat11-servlet-6.1-api","purl":"pkg:rpm/redhat/tomcat11-servlet-6.1-api","source":"RHSA-2026:44427"},{"ecosystem":"Red Hat:hummingbird:1","fixed":["0:11.0.24-0.2.hum1"],"introduced":["0"],"last_affected":[],"package":"tomcat11-user-instance","purl":"pkg:rpm/redhat/tomcat11-user-instance","source":"RHSA-2026:44427"},{"ecosystem":"Red Hat:hummingbird:1","fixed":["0:11.0.24-0.2.hum1"],"introduced":["0"],"last_affected":[],"package":"tomcat11-webapps","purl":"pkg:rpm/redhat/tomcat11-webapps","source":"RHSA-2026:44427"}],"prev":{"headline":"Apache Tomcat: Digest authenticator will authenticate any unknown user","id":"CVE-2026-43512"},"products":["Apache Tomcat"],"published":"2026-05-12","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":"CC BY 4.0","name":"Red Hat","prefix":"RHSA"},{"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":"2026-05-14","vendors":["Apache Software Foundation"]},"summary":"Attackers can bypass account lockout mechanisms by exploiting case sensitivity in user names, allowing continued brute-force attempts against locked accounts.","url":"https://insights.sbomify.com/CVE-2026-43513/"}