{"answers":{"affected":"7 open source packages ship an affected version, including org.apache.tomcat:tomcat and tomcat. It affects 3 products.","exploited":"There is no known exploitation of CVE-2021-41079 in the wild and no public exploit code.","fix":"Upgrade org.apache.tomcat:tomcat to a fixed version for your release line: 10.0.4, 8.5.64 or 9.0.44.","what":"CVE-2021-41079 is a high-severity denial of service vulnerability in Apache Tomcat, published on 16 Sep 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-2021-41079 and fix it if it is affected.\n\nWhat it is: CVE-2021-41079 is a high-severity denial of service vulnerability in Apache Tomcat, published on 16 Sep 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-2021-41079 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; fixed in 10.0.4\n- org.apache.tomcat:tomcat (Maven): affected from 10.0.0; fixed in 10.0.4\n- org.apache.tomcat:tomcat (Maven): affected from 8.5.0; fixed in 8.5.64\n- org.apache.tomcat:tomcat (Maven): affected from 8.5.0; fixed in 8.5.64\n- org.apache.tomcat:tomcat (Maven): affected from 9.0.0; fixed in 9.0.44\n- org.apache.tomcat:tomcat (Maven): affected from 9.0.0; fixed in 9.0.44\n- tomcat (Bitnami): affected from 8.5.0; fixed in 8.5.64, 9.0.44, 10.0.3\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-2021-41079/ (Markdown: https://insights.sbomify.com/CVE-2021-41079/index.md)","id":"CVE-2021-41079","markdown":"https://insights.sbomify.com/CVE-2021-41079/index.md","name":"CVE-2021-41079","record":{"aliases":["BIT-tomcat-2021-41079","DEBIAN-CVE-2021-41079","DLA-2764-1","DSA-4986-1","GHSA-59g9-7gfx-c72p","OESA-2021-1393","OESA-2022-1622","RHSA-2021:3741","UBUNTU-CVE-2021-41079"],"analysis":{"component_type":"server_software","fix_type":"upgrade","impacts":["denial_of_service"],"network_reachable":"yes","non_default_config":true,"product_category":"Apache Tomcat","requires_auth":"none","summary":"Attackers can cause a denial of service via infinite loop in Apache Tomcat when using NIO+OpenSSL or NIO2+OpenSSL for TLS.","user_interaction":"not_required","vuln_class":"denial_of_service"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"apache","cpe":[{"product":"tomcat","vendor":"apache"},{"product":"debian_linux","vendor":"debian"},{"product":"management_services_for_element_software_and_netapp_hci","vendor":"netapp"}],"cvss":{"score":7.5,"severity":"high","source":"nvd","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","version":"3.1"},"cwes":[{"id":"CWE-835","name":"Loop with Unreachable Exit Condition"},{"id":"CWE-20","name":"Improper Input Validation"}],"description":"Apache Tomcat 8.5.0 to 8.5.63, 9.0.0-M1 to 9.0.43 and 10.0.0-M1 to 10.0.2 did not properly validate incoming TLS packets. When Tomcat was configured to use NIO+OpenSSL or NIO2+OpenSSL for TLS, a specially crafted packet could be used to trigger an infinite loop resulting in a denial of service.","ecosystems":["Bitnami","Maven","Red Hat:jboss_enterprise_web_server:5.5::el7","Red Hat:jboss_enterprise_web_server:5.5::el8"],"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 DoS with unexpected TLS packet","id":"CVE-2021-41079","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"Bitnami","product":"apache:tomcat","products":["apache:tomcat","debian:debian_linux"],"type":"denial_of_service","year":"2021"},"n_packages":29,"n_references":6,"next":{"headline":"SQL injection in n/a","id":"CVE-2021-41080"},"packages":[{"ecosystem":"Bitnami","fixed":["8.5.64","9.0.44","10.0.3"],"introduced":["8.5.0","9.0.0","10.0.0"],"last_affected":[],"package":"tomcat","purl":"pkg:bitnami/tomcat","source":"BIT-tomcat-2021-41079"},{"ecosystem":"Maven","fixed":["10.0.4"],"introduced":["10.0.0"],"last_affected":[],"package":"org.apache.tomcat:tomcat","purl":null,"source":"GHSA-59g9-7gfx-c72p"},{"ecosystem":"Maven","fixed":["10.0.4"],"introduced":["10.0.0"],"last_affected":[],"package":"org.apache.tomcat:tomcat","purl":"pkg:maven/org.apache.tomcat/tomcat","source":"GHSA-59g9-7gfx-c72p"},{"ecosystem":"Maven","fixed":["8.5.64"],"introduced":["8.5.0"],"last_affected":[],"package":"org.apache.tomcat:tomcat","purl":null,"source":"GHSA-59g9-7gfx-c72p"},{"ecosystem":"Maven","fixed":["8.5.64"],"introduced":["8.5.0"],"last_affected":[],"package":"org.apache.tomcat:tomcat","purl":"pkg:maven/org.apache.tomcat/tomcat","source":"GHSA-59g9-7gfx-c72p"},{"ecosystem":"Maven","fixed":["9.0.44"],"introduced":["9.0.0"],"last_affected":[],"package":"org.apache.tomcat:tomcat","purl":null,"source":"GHSA-59g9-7gfx-c72p"},{"ecosystem":"Maven","fixed":["9.0.44"],"introduced":["9.0.0"],"last_affected":[],"package":"org.apache.tomcat:tomcat","purl":"pkg:maven/org.apache.tomcat/tomcat","source":"GHSA-59g9-7gfx-c72p"},{"ecosystem":"Red Hat:jboss_enterprise_web_server:5.5::el7","fixed":["0:9.0.43-13.redhat_00013.1.el7jws"],"introduced":["0"],"last_affected":[],"package":"jws5-tomcat","purl":"pkg:rpm/redhat/jws5-tomcat","source":"RHSA-2021:3741"},{"ecosystem":"Red Hat:jboss_enterprise_web_server:5.5::el7","fixed":["0:9.0.43-13.redhat_00013.1.el7jws"],"introduced":["0"],"last_affected":[],"package":"jws5-tomcat-admin-webapps","purl":"pkg:rpm/redhat/jws5-tomcat-admin-webapps","source":"RHSA-2021:3741"},{"ecosystem":"Red Hat:jboss_enterprise_web_server:5.5::el7","fixed":["0:9.0.43-13.redhat_00013.1.el7jws"],"introduced":["0"],"last_affected":[],"package":"jws5-tomcat-docs-webapp","purl":"pkg:rpm/redhat/jws5-tomcat-docs-webapp","source":"RHSA-2021:3741"},{"ecosystem":"Red Hat:jboss_enterprise_web_server:5.5::el7","fixed":["0:9.0.43-13.redhat_00013.1.el7jws"],"introduced":["0"],"last_affected":[],"package":"jws5-tomcat-el-3.0-api","purl":"pkg:rpm/redhat/jws5-tomcat-el-3.0-api","source":"RHSA-2021:3741"},{"ecosystem":"Red Hat:jboss_enterprise_web_server:5.5::el7","fixed":["0:9.0.43-13.redhat_00013.1.el7jws"],"introduced":["0"],"last_affected":[],"package":"jws5-tomcat-java-jdk11","purl":"pkg:rpm/redhat/jws5-tomcat-java-jdk11","source":"RHSA-2021:3741"},{"ecosystem":"Red Hat:jboss_enterprise_web_server:5.5::el7","fixed":["0:9.0.43-13.redhat_00013.1.el7jws"],"introduced":["0"],"last_affected":[],"package":"jws5-tomcat-java-jdk8","purl":"pkg:rpm/redhat/jws5-tomcat-java-jdk8","source":"RHSA-2021:3741"},{"ecosystem":"Red Hat:jboss_enterprise_web_server:5.5::el7","fixed":["0:9.0.43-13.redhat_00013.1.el7jws"],"introduced":["0"],"last_affected":[],"package":"jws5-tomcat-javadoc","purl":"pkg:rpm/redhat/jws5-tomcat-javadoc","source":"RHSA-2021:3741"},{"ecosystem":"Red Hat:jboss_enterprise_web_server:5.5::el7","fixed":["0:9.0.43-13.redhat_00013.1.el7jws"],"introduced":["0"],"last_affected":[],"package":"jws5-tomcat-jsp-2.3-api","purl":"pkg:rpm/redhat/jws5-tomcat-jsp-2.3-api","source":"RHSA-2021:3741"},{"ecosystem":"Red Hat:jboss_enterprise_web_server:5.5::el7","fixed":["0:9.0.43-13.redhat_00013.1.el7jws"],"introduced":["0"],"last_affected":[],"package":"jws5-tomcat-lib","purl":"pkg:rpm/redhat/jws5-tomcat-lib","source":"RHSA-2021:3741"},{"ecosystem":"Red Hat:jboss_enterprise_web_server:5.5::el7","fixed":["0:9.0.43-13.redhat_00013.1.el7jws"],"introduced":["0"],"last_affected":[],"package":"jws5-tomcat-selinux","purl":"pkg:rpm/redhat/jws5-tomcat-selinux","source":"RHSA-2021:3741"},{"ecosystem":"Red Hat:jboss_enterprise_web_server:5.5::el7","fixed":["0:9.0.43-13.redhat_00013.1.el7jws"],"introduced":["0"],"last_affected":[],"package":"jws5-tomcat-servlet-4.0-api","purl":"pkg:rpm/redhat/jws5-tomcat-servlet-4.0-api","source":"RHSA-2021:3741"},{"ecosystem":"Red Hat:jboss_enterprise_web_server:5.5::el7","fixed":["0:9.0.43-13.redhat_00013.1.el7jws"],"introduced":["0"],"last_affected":[],"package":"jws5-tomcat-webapps","purl":"pkg:rpm/redhat/jws5-tomcat-webapps","source":"RHSA-2021:3741"},{"ecosystem":"Red Hat:jboss_enterprise_web_server:5.5::el8","fixed":["0:9.0.43-13.redhat_00013.1.el8jws"],"introduced":["0"],"last_affected":[],"package":"jws5-tomcat","purl":"pkg:rpm/redhat/jws5-tomcat","source":"RHSA-2021:3741"},{"ecosystem":"Red Hat:jboss_enterprise_web_server:5.5::el8","fixed":["0:9.0.43-13.redhat_00013.1.el8jws"],"introduced":["0"],"last_affected":[],"package":"jws5-tomcat-admin-webapps","purl":"pkg:rpm/redhat/jws5-tomcat-admin-webapps","source":"RHSA-2021:3741"},{"ecosystem":"Red Hat:jboss_enterprise_web_server:5.5::el8","fixed":["0:9.0.43-13.redhat_00013.1.el8jws"],"introduced":["0"],"last_affected":[],"package":"jws5-tomcat-docs-webapp","purl":"pkg:rpm/redhat/jws5-tomcat-docs-webapp","source":"RHSA-2021:3741"},{"ecosystem":"Red Hat:jboss_enterprise_web_server:5.5::el8","fixed":["0:9.0.43-13.redhat_00013.1.el8jws"],"introduced":["0"],"last_affected":[],"package":"jws5-tomcat-el-3.0-api","purl":"pkg:rpm/redhat/jws5-tomcat-el-3.0-api","source":"RHSA-2021:3741"},{"ecosystem":"Red Hat:jboss_enterprise_web_server:5.5::el8","fixed":["0:9.0.43-13.redhat_00013.1.el8jws"],"introduced":["0"],"last_affected":[],"package":"jws5-tomcat-javadoc","purl":"pkg:rpm/redhat/jws5-tomcat-javadoc","source":"RHSA-2021:3741"},{"ecosystem":"Red Hat:jboss_enterprise_web_server:5.5::el8","fixed":["0:9.0.43-13.redhat_00013.1.el8jws"],"introduced":["0"],"last_affected":[],"package":"jws5-tomcat-jsp-2.3-api","purl":"pkg:rpm/redhat/jws5-tomcat-jsp-2.3-api","source":"RHSA-2021:3741"},{"ecosystem":"Red Hat:jboss_enterprise_web_server:5.5::el8","fixed":["0:9.0.43-13.redhat_00013.1.el8jws"],"introduced":["0"],"last_affected":[],"package":"jws5-tomcat-lib","purl":"pkg:rpm/redhat/jws5-tomcat-lib","source":"RHSA-2021:3741"},{"ecosystem":"Red Hat:jboss_enterprise_web_server:5.5::el8","fixed":["0:9.0.43-13.redhat_00013.1.el8jws"],"introduced":["0"],"last_affected":[],"package":"jws5-tomcat-selinux","purl":"pkg:rpm/redhat/jws5-tomcat-selinux","source":"RHSA-2021:3741"},{"ecosystem":"Red Hat:jboss_enterprise_web_server:5.5::el8","fixed":["0:9.0.43-13.redhat_00013.1.el8jws"],"introduced":["0"],"last_affected":[],"package":"jws5-tomcat-servlet-4.0-api","purl":"pkg:rpm/redhat/jws5-tomcat-servlet-4.0-api","source":"RHSA-2021:3741"},{"ecosystem":"Red Hat:jboss_enterprise_web_server:5.5::el8","fixed":["0:9.0.43-13.redhat_00013.1.el8jws"],"introduced":["0"],"last_affected":[],"package":"jws5-tomcat-webapps","purl":"pkg:rpm/redhat/jws5-tomcat-webapps","source":"RHSA-2021:3741"}],"prev":{"headline":"Nameko Arbitrary code execution due to YAML deserialization","id":"CVE-2021-41078"},"products":["Apache Tomcat"],"published":"2021-09-16","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":"2026-10-08","vendors":["Apache Software Foundation"]},"summary":"Attackers can cause a denial of service via infinite loop in Apache Tomcat when using NIO+OpenSSL or NIO2+OpenSSL for TLS.","url":"https://insights.sbomify.com/CVE-2021-41079/"}