{"answers":{"affected":"7 open source packages ship an affected version, including org.apache.tomcat:tomcat-coyote and tomcat. It affects 4 products.","exploited":"There is no known exploitation of CVE-2020-13943 in the wild and no public exploit code.","fix":"Upgrade org.apache.tomcat:tomcat-coyote to a fixed version for your release line: 10.0.0-M8, 8.5.58 or 9.0.38.","what":"CVE-2020-13943 is a medium-severity vulnerability in Apache Tomcat, published on 12 Oct 2020. Any signed-in user can exploit it over the network, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2020-13943 and fix it if it is affected.\n\nWhat it is: CVE-2020-13943 is a medium-severity vulnerability in Apache Tomcat, published on 12 Oct 2020. Any signed-in user can exploit it over the network, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2020-13943 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- org.apache.tomcat:tomcat-coyote (Maven): affected from 10.0.0-M1; fixed in 10.0.0-M8\n- org.apache.tomcat:tomcat-coyote (Maven): affected from 10.0.0-M1; fixed in 10.0.0-M8\n- org.apache.tomcat:tomcat-coyote (Maven): affected from 8.5.0; fixed in 8.5.58\n- org.apache.tomcat:tomcat-coyote (Maven): affected from 8.5.0; fixed in 8.5.58\n- org.apache.tomcat:tomcat-coyote (Maven): affected from 9.0.0-M1; fixed in 9.0.38\n- org.apache.tomcat:tomcat-coyote (Maven): affected from 9.0.0-M1; fixed in 9.0.38\n- tomcat (Bitnami): affected from 8.5.0; fixed in 8.5.1, 8.5.2, 8.5.3, 8.5.4, 8.5.5, 8.5.6, 8.5.7, 8.5.8, 8.5.9, 8.5.10, 8.5.11, 8.5.12, 8.5.13, 8.5.14, 8.5.15, 8.5.16, 8.5.17, 8.5.18, 8.5.19, 8.5.20, 8.5.21, 8.5.22, 8.5.23, 8.5.24, 8.5.25, 8.5.26, 8.5.27, 8.5.28, 8.5.29, 8.5.30, 8.5.31, 8.5.32, 8.5.33, 8.5.34, 8.5.35, 8.5.36, 8.5.37, 8.5.38, 8.5.39, 8.5.40, 8.5.41, 8.5.42, 8.5.43, 8.5.44, 8.5.45, 8.5.46, 8.5.47, 8.5.48, 8.5.49, 8.5.50, 8.5.51, 8.5.52, 8.5.53, 8.5.54, 8.5.55, 8.5.56, 8.5.57, 8.5.58, 9.0.38\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-2020-13943/ (Markdown: https://insights.sbomify.com/CVE-2020-13943/index.md)","id":"CVE-2020-13943","markdown":"https://insights.sbomify.com/CVE-2020-13943/index.md","name":"CVE-2020-13943","record":{"aliases":["BIT-tomcat-2020-13943","DEBIAN-CVE-2020-13943","DLA-2407-1","GHSA-f268-65qc-98vg","MGASA-2020-0397","SUSE-SU-2020:2996-1","SUSE-SU-2020:3068-1","SUSE-SU-2020:3069-1","openSUSE-SU-2020:1799-1","openSUSE-SU-2020:1842-1"],"analysis":{"component_type":"server_software","fix_type":"upgrade","impacts":["data_read"],"network_reachable":"yes","non_default_config":false,"product_category":"Apache Tomcat","requires_auth":"low_privilege","summary":"An attacker can cause users to see responses for unexpected resources by violating HTTP/2 stream limits, leading to information disclosure.","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":"instantis_enterprisetrack","vendor":"oracle"},{"product":"sd-wan_edge","vendor":"oracle"}],"cvss":{"score":4.3,"severity":"medium","source":"nvd","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N","version":"3.1"},"cwes":[],"description":"If an HTTP/2 client connecting to Apache Tomcat 10.0.0-M1 to 10.0.0-M7, 9.0.0.M1 to 9.0.37 or 8.5.0 to 8.5.57 exceeded the agreed maximum number of concurrent streams for a connection (in violation of the HTTP/2 protocol), it was possible that a subsequent request made on that connection could contain HTTP headers - including HTTP/2 pseudo headers - from a previous request rather than the intended headers. This could lead to users seeing responses for unexpected resources.","ecosystems":["Bitnami","Maven","SUSE:Linux Enterprise Module for Web and Scripting 15 SP1","SUSE:Linux Enterprise Module for Web and Scripting 15 SP2","SUSE:Linux Enterprise Server 12 SP5","SUSE:Linux Enterprise Server for SAP Applications 12 SP5","openSUSE:Leap 15.1","openSUSE:Leap 15.2"],"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":"Exposure of Sensitive Information to an Unauthorized Actor in Apache Tomcat","id":"CVE-2020-13943","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"Bitnami","product":"apache:tomcat","products":["apache:tomcat","debian:debian_linux","oracle:instantis_enterprisetrack"],"type":"information_disclosure","year":"2020"},"n_packages":13,"n_references":7,"next":{"headline":"Apache Airflow Cross-site Scripting","id":"CVE-2020-13944"},"packages":[{"ecosystem":"Bitnami","fixed":["8.5.1","8.5.2","8.5.3","8.5.4","8.5.5","8.5.6","8.5.7","8.5.8","8.5.9","8.5.10","8.5.11","8.5.12","8.5.13","8.5.14","8.5.15","8.5.16","8.5.17","8.5.18","8.5.19","8.5.20","8.5.21","8.5.22","8.5.23","8.5.24","8.5.25","8.5.26","8.5.27","8.5.28","8.5.29","8.5.30","8.5.31","8.5.32","8.5.33","8.5.34","8.5.35","8.5.36","8.5.37","8.5.38","8.5.39","8.5.40","8.5.41","8.5.42","8.5.43","8.5.44","8.5.45","8.5.46","8.5.47","8.5.48","8.5.49","8.5.50","8.5.51","8.5.52","8.5.53","8.5.54","8.5.55","8.5.56","8.5.57","8.5.58","9.0.38"],"introduced":["8.5.0","8.5.1","8.5.2","8.5.3","8.5.4","8.5.5","8.5.6","8.5.7","8.5.8","8.5.9","8.5.10","8.5.11","8.5.12","8.5.13","8.5.14","8.5.15","8.5.16","8.5.17","8.5.18","8.5.19","8.5.20","8.5.21","8.5.22","8.5.23","8.5.24","8.5.25","8.5.26","8.5.27","8.5.28","8.5.29","8.5.30","8.5.31","8.5.32","8.5.33","8.5.34","8.5.35","8.5.36","8.5.37","8.5.38","8.5.39","8.5.40","8.5.41","8.5.42","8.5.43","8.5.44","8.5.45","8.5.46","8.5.47","8.5.48","8.5.49","8.5.50","8.5.51","8.5.52","8.5.53","8.5.54","8.5.55","8.5.56","8.5.57","9.0.0"],"last_affected":[],"package":"tomcat","purl":"pkg:bitnami/tomcat","source":"BIT-tomcat-2020-13943"},{"ecosystem":"Maven","fixed":["10.0.0-M8"],"introduced":["10.0.0-M1"],"last_affected":[],"package":"org.apache.tomcat:tomcat-coyote","purl":null,"source":"GHSA-f268-65qc-98vg"},{"ecosystem":"Maven","fixed":["10.0.0-M8"],"introduced":["10.0.0-M1"],"last_affected":[],"package":"org.apache.tomcat:tomcat-coyote","purl":"pkg:maven/org.apache.tomcat/tomcat-coyote","source":"GHSA-f268-65qc-98vg"},{"ecosystem":"Maven","fixed":["8.5.58"],"introduced":["8.5.0"],"last_affected":[],"package":"org.apache.tomcat:tomcat-coyote","purl":null,"source":"GHSA-f268-65qc-98vg"},{"ecosystem":"Maven","fixed":["8.5.58"],"introduced":["8.5.0"],"last_affected":[],"package":"org.apache.tomcat:tomcat-coyote","purl":"pkg:maven/org.apache.tomcat/tomcat-coyote","source":"GHSA-f268-65qc-98vg"},{"ecosystem":"Maven","fixed":["9.0.38"],"introduced":["9.0.0-M1"],"last_affected":[],"package":"org.apache.tomcat:tomcat-coyote","purl":null,"source":"GHSA-f268-65qc-98vg"},{"ecosystem":"Maven","fixed":["9.0.38"],"introduced":["9.0.0-M1"],"last_affected":[],"package":"org.apache.tomcat:tomcat-coyote","purl":"pkg:maven/org.apache.tomcat/tomcat-coyote","source":"GHSA-f268-65qc-98vg"},{"ecosystem":"SUSE:Linux Enterprise Module for Web and Scripting 15 SP1","fixed":["9.0.36-4.47.3"],"introduced":["0"],"last_affected":[],"package":"tomcat","purl":"pkg:rpm/suse/tomcat\u0026distro=SUSE%20Linux%20Enterprise%20Module%20for%20Web%20and%20Scripting%2015%20SP1","source":"SUSE-SU-2020:3069-1"},{"ecosystem":"SUSE:Linux Enterprise Module for Web and Scripting 15 SP2","fixed":["9.0.36-3.12.3"],"introduced":["0"],"last_affected":[],"package":"tomcat","purl":"pkg:rpm/suse/tomcat\u0026distro=SUSE%20Linux%20Enterprise%20Module%20for%20Web%20and%20Scripting%2015%20SP2","source":"SUSE-SU-2020:3068-1"},{"ecosystem":"SUSE:Linux Enterprise Server 12 SP5","fixed":["9.0.36-3.50.1"],"introduced":["0"],"last_affected":[],"package":"tomcat","purl":"pkg:rpm/suse/tomcat\u0026distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP5","source":"SUSE-SU-2020:2996-1"},{"ecosystem":"SUSE:Linux Enterprise Server for SAP Applications 12 SP5","fixed":["9.0.36-3.50.1"],"introduced":["0"],"last_affected":[],"package":"tomcat","purl":"pkg:rpm/suse/tomcat\u0026distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP5","source":"SUSE-SU-2020:2996-1"},{"ecosystem":"openSUSE:Leap 15.1","fixed":["9.0.36-lp151.3.33.1"],"introduced":["0"],"last_affected":[],"package":"tomcat","purl":"pkg:rpm/opensuse/tomcat\u0026distro=openSUSE%20Leap%2015.1","source":"openSUSE-SU-2020:1842-1"},{"ecosystem":"openSUSE:Leap 15.2","fixed":["9.0.36-lp152.2.10.1"],"introduced":["0"],"last_affected":[],"package":"tomcat","purl":"pkg:rpm/opensuse/tomcat\u0026distro=openSUSE%20Leap%2015.2","source":"openSUSE-SU-2020:1799-1"}],"prev":{"headline":"Remote Code Execution in Apache Unomi","id":"CVE-2020-13942"},"products":["Apache Tomcat"],"published":"2020-10-12","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":"SUSE","prefix":"SUSE"},{"class":"attribution","licence":"CC BY 4.0","name":"SUSE","prefix":"openSUSE"},{"class":"attribution","licence":"US public information, NVD API terms","name":"NVD"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":"yes","exploitation":"none","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-10-08","vendors":["n/a"]},"summary":"An attacker can cause users to see responses for unexpected resources by violating HTTP/2 stream limits, leading to information disclosure.","url":"https://insights.sbomify.com/CVE-2020-13943/"}