{"answers":{"affected":"7 open source packages ship an affected version, including org.apache.tomcat:tomcat-coyote and tomcat. It affects 12 products.","exploited":"There is no known exploitation of CVE-2020-17527 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-M10, 8.5.60 or 9.0.40.","what":"CVE-2020-17527 is a high-severity vulnerability in Apache Tomcat, published on 3 Dec 2020. An attacker can exploit it over the internet without logging in, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2020-17527 and fix it if it is affected.\n\nWhat it is: CVE-2020-17527 is a high-severity vulnerability in Apache Tomcat, published on 3 Dec 2020. 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-2020-17527 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-M10\n- org.apache.tomcat:tomcat-coyote (Maven): affected from 10.0.0-M1; fixed in 10.0.0-M10\n- org.apache.tomcat:tomcat-coyote (Maven): affected from 8.5.0; fixed in 8.5.60\n- org.apache.tomcat:tomcat-coyote (Maven): affected from 8.5.0; fixed in 8.5.60\n- org.apache.tomcat:tomcat-coyote (Maven): affected from 9.0.0-M1; fixed in 9.0.40\n- org.apache.tomcat:tomcat-coyote (Maven): affected from 9.0.0-M1; fixed in 9.0.40\n- tomcat (Bitnami): affected from 8.5.1; fixed in 8.5.60, 9.0.40\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-2020-17527/ (Markdown: https://insights.sbomify.com/CVE-2020-17527/index.md)","id":"CVE-2020-17527","markdown":"https://insights.sbomify.com/CVE-2020-17527/index.md","name":"CVE-2020-17527","record":{"aliases":["AZL-6909","AZL-7384","BIT-tomcat-2020-17527","DEBIAN-CVE-2020-17527","DLA-2495-1","GHSA-vvw4-rfwf-p6hx","MGASA-2021-0020","SUSE-SU-2021:0031-1","SUSE-SU-2021:0041-1","SUSE-SU-2021:0042-1","UBUNTU-CVE-2020-17527","openSUSE-SU-2021:0043-1","openSUSE-SU-2021:0081-1"],"analysis":{"component_type":"server_software","fix_type":"upgrade","impacts":["data_read"],"network_reachable":"yes","non_default_config":false,"product_category":"Apache Tomcat","requires_auth":"none","summary":"Apache Tomcat may leak request header information between HTTP/2 streams, potentially exposing sensitive data to attackers.","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":"element_plug-in","vendor":"netapp"},{"product":"oncommand_system_manager","vendor":"netapp"},{"product":"blockchain_platform","vendor":"oracle"},{"product":"communications_cloud_native_core_binding_support_function","vendor":"oracle"},{"product":"communications_cloud_native_core_policy","vendor":"oracle"},{"product":"communications_instant_messaging_server","vendor":"oracle"},{"product":"instantis_enterprisetrack","vendor":"oracle"},{"product":"mysql_enterprise_monitor","vendor":"oracle"},{"product":"sd-wan_edge","vendor":"oracle"},{"product":"workload_manager","vendor":"oracle"}],"cvss":{"score":7.5,"severity":"high","source":"nvd","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-200","name":"Exposure of Sensitive Information to an Unauthorized Actor"}],"description":"While investigating bug 64830 it was discovered that Apache Tomcat 10.0.0-M1 to 10.0.0-M9, 9.0.0-M1 to 9.0.39 and 8.5.0 to 8.5.59 could re-use an HTTP request header value from the previous stream received on an HTTP/2 connection for the request associated with the subsequent stream. While this would most likely lead to an error and the closure of the HTTP/2 connection, it is possible that information could leak between requests.","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 SP4-LTSS","SUSE:Linux Enterprise Server 12 SP5","SUSE:Linux Enterprise Server for SAP Applications 12 SP4","SUSE:Linux Enterprise Server for SAP Applications 12 SP5","SUSE:OpenStack Cloud 9","SUSE:OpenStack Cloud Crowbar 9","openSUSE:Leap 15.1","openSUSE:Leap 15.2"],"exploits":{"exploitdb":0,"first_seen":"2021-02-05","github_poc":1,"max_poc_stars":2,"metasploit":0,"nuclei":0,"refs":[{"date":"2021-02-05T00:18:45Z","kind":"github_poc","ref":"https://github.com/forse01/CVE-2020-17527-Tomcat","stars":2,"title":null}],"tier":"poc_unverified"},"has_fix":true,"headline":"Apache Tomcat: Request header mix-up between HTTP/2 streams","id":"CVE-2020-17527","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"Bitnami","product":"apache:tomcat","products":["apache:tomcat","debian:debian_linux","oracle:communications_cloud_native_core_binding_support_function","oracle:communications_cloud_native_core_policy","oracle:communications_instant_messaging_server","oracle:instantis_enterprisetrack","oracle:mysql_enterprise_monitor"],"type":"information_disclosure","year":"2020"},"n_packages":17,"n_references":25,"next":{"headline":"Apache NuttX (incubating) Out of Bound Write from invalid TCP Urgent length","id":"CVE-2020-17528"},"packages":[{"ecosystem":"Bitnami","fixed":["8.5.60","9.0.40"],"introduced":["8.5.1","9.0.1"],"last_affected":[],"package":"tomcat","purl":"pkg:bitnami/tomcat","source":"BIT-tomcat-2020-17527"},{"ecosystem":"Maven","fixed":["10.0.0-M10"],"introduced":["10.0.0-M1"],"last_affected":[],"package":"org.apache.tomcat:tomcat-coyote","purl":null,"source":"GHSA-vvw4-rfwf-p6hx"},{"ecosystem":"Maven","fixed":["10.0.0-M10"],"introduced":["10.0.0-M1"],"last_affected":[],"package":"org.apache.tomcat:tomcat-coyote","purl":"pkg:maven/org.apache.tomcat/tomcat-coyote","source":"GHSA-vvw4-rfwf-p6hx"},{"ecosystem":"Maven","fixed":["8.5.60"],"introduced":["8.5.0"],"last_affected":[],"package":"org.apache.tomcat:tomcat-coyote","purl":null,"source":"GHSA-vvw4-rfwf-p6hx"},{"ecosystem":"Maven","fixed":["8.5.60"],"introduced":["8.5.0"],"last_affected":[],"package":"org.apache.tomcat:tomcat-coyote","purl":"pkg:maven/org.apache.tomcat/tomcat-coyote","source":"GHSA-vvw4-rfwf-p6hx"},{"ecosystem":"Maven","fixed":["9.0.40"],"introduced":["9.0.0-M1"],"last_affected":[],"package":"org.apache.tomcat:tomcat-coyote","purl":null,"source":"GHSA-vvw4-rfwf-p6hx"},{"ecosystem":"Maven","fixed":["9.0.40"],"introduced":["9.0.0-M1"],"last_affected":[],"package":"org.apache.tomcat:tomcat-coyote","purl":"pkg:maven/org.apache.tomcat/tomcat-coyote","source":"GHSA-vvw4-rfwf-p6hx"},{"ecosystem":"SUSE:Linux Enterprise Module for Web and Scripting 15 SP1","fixed":["9.0.36-4.53.1"],"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-2021:0042-1"},{"ecosystem":"SUSE:Linux Enterprise Module for Web and Scripting 15 SP2","fixed":["9.0.36-3.18.1"],"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-2021:0041-1"},{"ecosystem":"SUSE:Linux Enterprise Server 12 SP4-LTSS","fixed":["9.0.36-3.58.1"],"introduced":["0"],"last_affected":[],"package":"tomcat","purl":"pkg:rpm/suse/tomcat\u0026distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP4-LTSS","source":"SUSE-SU-2021:0031-1"},{"ecosystem":"SUSE:Linux Enterprise Server 12 SP5","fixed":["9.0.36-3.58.1"],"introduced":["0"],"last_affected":[],"package":"tomcat","purl":"pkg:rpm/suse/tomcat\u0026distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP5","source":"SUSE-SU-2021:0031-1"},{"ecosystem":"SUSE:Linux Enterprise Server for SAP Applications 12 SP4","fixed":["9.0.36-3.58.1"],"introduced":["0"],"last_affected":[],"package":"tomcat","purl":"pkg:rpm/suse/tomcat\u0026distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP4","source":"SUSE-SU-2021:0031-1"},{"ecosystem":"SUSE:Linux Enterprise Server for SAP Applications 12 SP5","fixed":["9.0.36-3.58.1"],"introduced":["0"],"last_affected":[],"package":"tomcat","purl":"pkg:rpm/suse/tomcat\u0026distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP5","source":"SUSE-SU-2021:0031-1"},{"ecosystem":"SUSE:OpenStack Cloud 9","fixed":["9.0.36-3.58.1"],"introduced":["0"],"last_affected":[],"package":"tomcat","purl":"pkg:rpm/suse/tomcat\u0026distro=SUSE%20OpenStack%20Cloud%209","source":"SUSE-SU-2021:0031-1"},{"ecosystem":"SUSE:OpenStack Cloud Crowbar 9","fixed":["9.0.36-3.58.1"],"introduced":["0"],"last_affected":[],"package":"tomcat","purl":"pkg:rpm/suse/tomcat\u0026distro=SUSE%20OpenStack%20Cloud%20Crowbar%209","source":"SUSE-SU-2021:0031-1"},{"ecosystem":"openSUSE:Leap 15.1","fixed":["9.0.36-lp151.3.39.1"],"introduced":["0"],"last_affected":[],"package":"tomcat","purl":"pkg:rpm/opensuse/tomcat\u0026distro=openSUSE%20Leap%2015.1","source":"openSUSE-SU-2021:0081-1"},{"ecosystem":"openSUSE:Leap 15.2","fixed":["9.0.36-lp152.2.16.1"],"introduced":["0"],"last_affected":[],"package":"tomcat","purl":"pkg:rpm/opensuse/tomcat\u0026distro=openSUSE%20Leap%2015.2","source":"openSUSE-SU-2021:0043-1"}],"prev":{"headline":"Incorrect Session Validation in Apache Airflow","id":"CVE-2020-17526"},"products":["Apache Tomcat"],"published":"2020-12-03","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":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"},{"class":"open","licence":"CC0","name":"PoC-in-GitHub"}],"ssvc":{"automatable":"yes","exploitation":"none","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-10-08","vendors":["Apache Software Foundation"]},"summary":"Apache Tomcat may leak request header information between HTTP/2 streams, potentially exposing sensitive data to attackers.","url":"https://insights.sbomify.com/CVE-2020-17527/"}