{"answers":{"affected":"8 open source packages ship an affected version, including org.apache.tomcat.embed:tomcat-embed-core. It affects 8 products.","exploited":"There is no known exploitation of CVE-2018-1336 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: 7.0.87, 8.0.51, 8.5.31 or 9.0.8.","what":"CVE-2018-1336 is a high-severity denial of service vulnerability in Apache Tomcat, published on 2 Aug 2018. An attacker can exploit it over the internet without logging in, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2018-1336 and fix it if it is affected.\n\nWhat it is: CVE-2018-1336 is a high-severity denial of service vulnerability in Apache Tomcat, published on 2 Aug 2018. 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-2018-1336 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 7.0.28; fixed in 7.0.87\n- org.apache.tomcat.embed:tomcat-embed-core (Maven): affected from 7.0.28; fixed in 7.0.87\n- org.apache.tomcat.embed:tomcat-embed-core (Maven): affected from 8.0.0RC1; fixed in 8.0.51\n- org.apache.tomcat.embed:tomcat-embed-core (Maven): affected from 8.0.0RC1; fixed in 8.0.51\n- org.apache.tomcat.embed:tomcat-embed-core (Maven): affected from 8.5.0; fixed in 8.5.31\n- org.apache.tomcat.embed:tomcat-embed-core (Maven): affected from 8.5.0; fixed in 8.5.31\n- org.apache.tomcat.embed:tomcat-embed-core (Maven): affected from 9.0.0.M9; fixed in 9.0.8\n- org.apache.tomcat.embed:tomcat-embed-core (Maven): affected from 9.0.0.M9; fixed in 9.0.8\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-2018-1336/ (Markdown: https://insights.sbomify.com/CVE-2018-1336/index.md)","id":"CVE-2018-1336","markdown":"https://insights.sbomify.com/CVE-2018-1336/index.md","name":"CVE-2018-1336","record":{"aliases":["GHSA-m59c-jpc8-m2x4","RHEA-2018:2188","RHEA-2018:2189","RHSA-2018:2701","RHSA-2018:2921","UBUNTU-CVE-2018-1336"],"analysis":{"component_type":"server_software","fix_type":"upgrade","impacts":["denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"Apache Tomcat","requires_auth":"none","summary":"An attacker can cause a denial of service in Apache Tomcat by sending specially crafted UTF-8 supplementary characters that trigger an infinite loop in the decoder.","user_interaction":"not_required","vuln_class":"denial_of_service"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"apache","cpe":[{"product":"tomcat","vendor":"apache"},{"product":"ubuntu_linux","vendor":"canonical"},{"product":"debian_linux","vendor":"debian"},{"product":"enterprise_linux_desktop","vendor":"redhat"},{"product":"enterprise_linux_server","vendor":"redhat"},{"product":"enterprise_linux_workstation","vendor":"redhat"},{"product":"jboss_enterprise_application_platform","vendor":"redhat"},{"product":"jboss_enterprise_web_server","vendor":"redhat"}],"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"}],"description":"An improper handing of overflow in the UTF-8 decoder with supplementary characters can lead to an infinite loop in the decoder causing a Denial of Service. Versions Affected: Apache Tomcat 9.0.0.M9 to 9.0.7, 8.5.0 to 8.5.30, 8.0.0.RC1 to 8.0.51, and 7.0.28 to 7.0.86.","ecosystems":["Maven","Red Hat:enterprise_linux:7::client","Red Hat:enterprise_linux:7::computenode","Red Hat:enterprise_linux:7::server","Red Hat:enterprise_linux:7::workstation","Red Hat:jboss_enterprise_web_server:3.1::el6","Red Hat:jboss_enterprise_web_server:3.1::el7","Red Hat:jboss_enterprise_web_server:5.0::el6","Red Hat:jboss_enterprise_web_server:5.0::el7"],"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":"In Apache Tomcat there is an improper handing of overflow in the UTF-8 decoder","id":"CVE-2018-1336","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"Maven","product":"apache:tomcat","products":["apache:tomcat","canonical:ubuntu_linux","debian:debian_linux","redhat:enterprise_linux_desktop","redhat:enterprise_linux_server","redhat:enterprise_linux_workstation","redhat:jboss_enterprise_application_platform"],"type":"denial_of_service","year":"2018"},"n_packages":142,"n_references":38,"next":{"headline":"Credential leak in org.apache.directory.api:apache-ldap-api","id":"CVE-2018-1337"},"packages":[{"ecosystem":"Maven","fixed":["7.0.87"],"introduced":["7.0.28"],"last_affected":[],"package":"org.apache.tomcat.embed:tomcat-embed-core","purl":null,"source":"GHSA-m59c-jpc8-m2x4"},{"ecosystem":"Maven","fixed":["7.0.87"],"introduced":["7.0.28"],"last_affected":[],"package":"org.apache.tomcat.embed:tomcat-embed-core","purl":"pkg:maven/org.apache.tomcat.embed/tomcat-embed-core","source":"GHSA-m59c-jpc8-m2x4"},{"ecosystem":"Maven","fixed":["8.0.51"],"introduced":["8.0.0RC1"],"last_affected":[],"package":"org.apache.tomcat.embed:tomcat-embed-core","purl":null,"source":"GHSA-m59c-jpc8-m2x4"},{"ecosystem":"Maven","fixed":["8.0.51"],"introduced":["8.0.0RC1"],"last_affected":[],"package":"org.apache.tomcat.embed:tomcat-embed-core","purl":"pkg:maven/org.apache.tomcat.embed/tomcat-embed-core","source":"GHSA-m59c-jpc8-m2x4"},{"ecosystem":"Maven","fixed":["8.5.31"],"introduced":["8.5.0"],"last_affected":[],"package":"org.apache.tomcat.embed:tomcat-embed-core","purl":null,"source":"GHSA-m59c-jpc8-m2x4"},{"ecosystem":"Maven","fixed":["8.5.31"],"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-m59c-jpc8-m2x4"},{"ecosystem":"Maven","fixed":["9.0.8"],"introduced":["9.0.0.M9"],"last_affected":[],"package":"org.apache.tomcat.embed:tomcat-embed-core","purl":null,"source":"GHSA-m59c-jpc8-m2x4"},{"ecosystem":"Maven","fixed":["9.0.8"],"introduced":["9.0.0.M9"],"last_affected":[],"package":"org.apache.tomcat.embed:tomcat-embed-core","purl":"pkg:maven/org.apache.tomcat.embed/tomcat-embed-core","source":"GHSA-m59c-jpc8-m2x4"},{"ecosystem":"Red Hat:enterprise_linux:7::client","fixed":["0:7.0.76-8.el7_5"],"introduced":["0"],"last_affected":[],"package":"tomcat","purl":"pkg:rpm/redhat/tomcat","source":"RHSA-2018:2921"},{"ecosystem":"Red Hat:enterprise_linux:7::client","fixed":["0:7.0.76-8.el7_5"],"introduced":["0"],"last_affected":[],"package":"tomcat-admin-webapps","purl":"pkg:rpm/redhat/tomcat-admin-webapps","source":"RHSA-2018:2921"},{"ecosystem":"Red Hat:enterprise_linux:7::client","fixed":["0:7.0.76-8.el7_5"],"introduced":["0"],"last_affected":[],"package":"tomcat-docs-webapp","purl":"pkg:rpm/redhat/tomcat-docs-webapp","source":"RHSA-2018:2921"},{"ecosystem":"Red Hat:enterprise_linux:7::client","fixed":["0:7.0.76-8.el7_5"],"introduced":["0"],"last_affected":[],"package":"tomcat-el-2.2-api","purl":"pkg:rpm/redhat/tomcat-el-2.2-api","source":"RHSA-2018:2921"},{"ecosystem":"Red Hat:enterprise_linux:7::client","fixed":["0:7.0.76-8.el7_5"],"introduced":["0"],"last_affected":[],"package":"tomcat-javadoc","purl":"pkg:rpm/redhat/tomcat-javadoc","source":"RHSA-2018:2921"},{"ecosystem":"Red Hat:enterprise_linux:7::client","fixed":["0:7.0.76-8.el7_5"],"introduced":["0"],"last_affected":[],"package":"tomcat-jsp-2.2-api","purl":"pkg:rpm/redhat/tomcat-jsp-2.2-api","source":"RHSA-2018:2921"},{"ecosystem":"Red Hat:enterprise_linux:7::client","fixed":["0:7.0.76-8.el7_5"],"introduced":["0"],"last_affected":[],"package":"tomcat-jsvc","purl":"pkg:rpm/redhat/tomcat-jsvc","source":"RHSA-2018:2921"},{"ecosystem":"Red Hat:enterprise_linux:7::client","fixed":["0:7.0.76-8.el7_5"],"introduced":["0"],"last_affected":[],"package":"tomcat-lib","purl":"pkg:rpm/redhat/tomcat-lib","source":"RHSA-2018:2921"},{"ecosystem":"Red Hat:enterprise_linux:7::client","fixed":["0:7.0.76-8.el7_5"],"introduced":["0"],"last_affected":[],"package":"tomcat-servlet-3.0-api","purl":"pkg:rpm/redhat/tomcat-servlet-3.0-api","source":"RHSA-2018:2921"},{"ecosystem":"Red Hat:enterprise_linux:7::client","fixed":["0:7.0.76-8.el7_5"],"introduced":["0"],"last_affected":[],"package":"tomcat-webapps","purl":"pkg:rpm/redhat/tomcat-webapps","source":"RHSA-2018:2921"},{"ecosystem":"Red Hat:enterprise_linux:7::computenode","fixed":["0:7.0.76-8.el7_5"],"introduced":["0"],"last_affected":[],"package":"tomcat","purl":"pkg:rpm/redhat/tomcat","source":"RHSA-2018:2921"},{"ecosystem":"Red Hat:enterprise_linux:7::computenode","fixed":["0:7.0.76-8.el7_5"],"introduced":["0"],"last_affected":[],"package":"tomcat-admin-webapps","purl":"pkg:rpm/redhat/tomcat-admin-webapps","source":"RHSA-2018:2921"},{"ecosystem":"Red Hat:enterprise_linux:7::computenode","fixed":["0:7.0.76-8.el7_5"],"introduced":["0"],"last_affected":[],"package":"tomcat-docs-webapp","purl":"pkg:rpm/redhat/tomcat-docs-webapp","source":"RHSA-2018:2921"},{"ecosystem":"Red Hat:enterprise_linux:7::computenode","fixed":["0:7.0.76-8.el7_5"],"introduced":["0"],"last_affected":[],"package":"tomcat-el-2.2-api","purl":"pkg:rpm/redhat/tomcat-el-2.2-api","source":"RHSA-2018:2921"},{"ecosystem":"Red Hat:enterprise_linux:7::computenode","fixed":["0:7.0.76-8.el7_5"],"introduced":["0"],"last_affected":[],"package":"tomcat-javadoc","purl":"pkg:rpm/redhat/tomcat-javadoc","source":"RHSA-2018:2921"},{"ecosystem":"Red Hat:enterprise_linux:7::computenode","fixed":["0:7.0.76-8.el7_5"],"introduced":["0"],"last_affected":[],"package":"tomcat-jsp-2.2-api","purl":"pkg:rpm/redhat/tomcat-jsp-2.2-api","source":"RHSA-2018:2921"},{"ecosystem":"Red Hat:enterprise_linux:7::computenode","fixed":["0:7.0.76-8.el7_5"],"introduced":["0"],"last_affected":[],"package":"tomcat-jsvc","purl":"pkg:rpm/redhat/tomcat-jsvc","source":"RHSA-2018:2921"},{"ecosystem":"Red Hat:enterprise_linux:7::computenode","fixed":["0:7.0.76-8.el7_5"],"introduced":["0"],"last_affected":[],"package":"tomcat-lib","purl":"pkg:rpm/redhat/tomcat-lib","source":"RHSA-2018:2921"},{"ecosystem":"Red Hat:enterprise_linux:7::computenode","fixed":["0:7.0.76-8.el7_5"],"introduced":["0"],"last_affected":[],"package":"tomcat-servlet-3.0-api","purl":"pkg:rpm/redhat/tomcat-servlet-3.0-api","source":"RHSA-2018:2921"},{"ecosystem":"Red Hat:enterprise_linux:7::computenode","fixed":["0:7.0.76-8.el7_5"],"introduced":["0"],"last_affected":[],"package":"tomcat-webapps","purl":"pkg:rpm/redhat/tomcat-webapps","source":"RHSA-2018:2921"},{"ecosystem":"Red Hat:enterprise_linux:7::server","fixed":["0:7.0.76-8.el7_5"],"introduced":["0"],"last_affected":[],"package":"tomcat","purl":"pkg:rpm/redhat/tomcat","source":"RHSA-2018:2921"},{"ecosystem":"Red Hat:enterprise_linux:7::server","fixed":["0:7.0.76-8.el7_5"],"introduced":["0"],"last_affected":[],"package":"tomcat-admin-webapps","purl":"pkg:rpm/redhat/tomcat-admin-webapps","source":"RHSA-2018:2921"},{"ecosystem":"Red Hat:enterprise_linux:7::server","fixed":["0:7.0.76-8.el7_5"],"introduced":["0"],"last_affected":[],"package":"tomcat-docs-webapp","purl":"pkg:rpm/redhat/tomcat-docs-webapp","source":"RHSA-2018:2921"},{"ecosystem":"Red Hat:enterprise_linux:7::server","fixed":["0:7.0.76-8.el7_5"],"introduced":["0"],"last_affected":[],"package":"tomcat-el-2.2-api","purl":"pkg:rpm/redhat/tomcat-el-2.2-api","source":"RHSA-2018:2921"},{"ecosystem":"Red Hat:enterprise_linux:7::server","fixed":["0:7.0.76-8.el7_5"],"introduced":["0"],"last_affected":[],"package":"tomcat-javadoc","purl":"pkg:rpm/redhat/tomcat-javadoc","source":"RHSA-2018:2921"},{"ecosystem":"Red Hat:enterprise_linux:7::server","fixed":["0:7.0.76-8.el7_5"],"introduced":["0"],"last_affected":[],"package":"tomcat-jsp-2.2-api","purl":"pkg:rpm/redhat/tomcat-jsp-2.2-api","source":"RHSA-2018:2921"},{"ecosystem":"Red Hat:enterprise_linux:7::server","fixed":["0:7.0.76-8.el7_5"],"introduced":["0"],"last_affected":[],"package":"tomcat-jsvc","purl":"pkg:rpm/redhat/tomcat-jsvc","source":"RHSA-2018:2921"},{"ecosystem":"Red Hat:enterprise_linux:7::server","fixed":["0:7.0.76-8.el7_5"],"introduced":["0"],"last_affected":[],"package":"tomcat-lib","purl":"pkg:rpm/redhat/tomcat-lib","source":"RHSA-2018:2921"},{"ecosystem":"Red Hat:enterprise_linux:7::server","fixed":["0:7.0.76-8.el7_5"],"introduced":["0"],"last_affected":[],"package":"tomcat-servlet-3.0-api","purl":"pkg:rpm/redhat/tomcat-servlet-3.0-api","source":"RHSA-2018:2921"},{"ecosystem":"Red Hat:enterprise_linux:7::server","fixed":["0:7.0.76-8.el7_5"],"introduced":["0"],"last_affected":[],"package":"tomcat-webapps","purl":"pkg:rpm/redhat/tomcat-webapps","source":"RHSA-2018:2921"},{"ecosystem":"Red Hat:enterprise_linux:7::workstation","fixed":["0:7.0.76-8.el7_5"],"introduced":["0"],"last_affected":[],"package":"tomcat","purl":"pkg:rpm/redhat/tomcat","source":"RHSA-2018:2921"},{"ecosystem":"Red Hat:enterprise_linux:7::workstation","fixed":["0:7.0.76-8.el7_5"],"introduced":["0"],"last_affected":[],"package":"tomcat-admin-webapps","purl":"pkg:rpm/redhat/tomcat-admin-webapps","source":"RHSA-2018:2921"}],"prev":{"headline":"Command injection in org.apache.tika:tika-core","id":"CVE-2018-1335"},"products":["Apache Tomcat"],"published":"2018-08-02","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":"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":"2024-11-14","vendors":["Apache Software Foundation"]},"summary":"An attacker can cause a denial of service in Apache Tomcat by sending specially crafted UTF-8 supplementary characters that trigger an infinite loop in the decoder.","url":"https://insights.sbomify.com/CVE-2018-1336/"}