{"answers":{"affected":"10 open source packages ship an affected version, including org.apache.tomcat:tomcat-coyote. It affects 1 product.","exploited":"There is no known exploitation of CVE-2016-6816 in the wild and no public exploit code.","fix":"Upgrade org.apache.tomcat:tomcat-coyote to a fixed version for your release line: 6.0.48, 7.0.73, 8.0.39 or 8.5.8.","what":"CVE-2016-6816 is a high-severity cross-site scripting vulnerability in Apache Tomcat, published on 20 Mar 2017. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link."},"fix_prompt":"Check this codebase for CVE-2016-6816 and fix it if it is affected.\n\nWhat it is: CVE-2016-6816 is a high-severity cross-site scripting vulnerability in Apache Tomcat, published on 20 Mar 2017. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.\nExploitation: There is no known exploitation of CVE-2016-6816 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- org.apache.tomcat:tomcat-coyote (Maven): affected from 6.0.0; fixed in 6.0.48\n- org.apache.tomcat:tomcat-coyote (Maven): affected from 6.0.0; fixed in 6.0.48\n- org.apache.tomcat:tomcat-coyote (Maven): affected from 7.0.0; fixed in 7.0.73\n- org.apache.tomcat:tomcat-coyote (Maven): affected from 7.0.0; fixed in 7.0.73\n- org.apache.tomcat:tomcat-coyote (Maven): affected from 8.0.0RC1; fixed in 8.0.39\n- org.apache.tomcat:tomcat-coyote (Maven): affected from 8.0.0RC1; fixed in 8.0.39\n- org.apache.tomcat:tomcat-coyote (Maven): affected from 8.5.0; fixed in 8.5.8\n- org.apache.tomcat:tomcat-coyote (Maven): affected from 8.5.0; fixed in 8.5.8\n- org.apache.tomcat:tomcat-coyote (Maven): affected from 9.0.0.M1; fixed in 9.0.0.M12\n- org.apache.tomcat:tomcat-coyote (Maven): affected from 9.0.0.M1; fixed in 9.0.0.M12\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-2016-6816/ (Markdown: https://insights.sbomify.com/CVE-2016-6816/index.md)","id":"CVE-2016-6816","markdown":"https://insights.sbomify.com/CVE-2016-6816/index.md","name":"CVE-2016-6816","record":{"aliases":["GHSA-jc7p-5r39-9477","UBUNTU-CVE-2016-6816"],"analysis":{"component_type":"server_software","fix_type":"upgrade","impacts":["data_read","security_bypass"],"network_reachable":"yes","non_default_config":false,"product_category":"Apache Tomcat","requires_auth":"none","summary":"Attackers can inject data into HTTP responses via invalid characters, enabling XSS, cache poisoning, and sensitive information disclosure in Apache Tomcat.","user_interaction":"required","vuln_class":"xss"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"apache","cpe":[{"product":"tomcat","vendor":"apache"}],"cvss":{"score":7.1,"severity":"high","source":"nvd","vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L","version":"3.0"},"cwes":[{"id":"CWE-20","name":"Improper Input Validation"}],"description":"The code in Apache Tomcat 9.0.0.M1 to 9.0.0.M11, 8.5.0 to 8.5.6, 8.0.0.RC1 to 8.0.38, 7.0.0 to 7.0.72, and 6.0.0 to 6.0.47 that parsed the HTTP request line permitted invalid characters. This could be exploited, in conjunction with a proxy that also permitted the invalid characters but with a different interpretation, to inject data into the HTTP response. By manipulating the HTTP response the attacker could poison a web-cache, perform an XSS attack and/or obtain sensitive information from requests other then their own.","ecosystems":["Maven"],"exploits":{"exploitdb":1,"first_seen":"2017-04-04","github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[{"date":"2017-04-04","kind":"exploitdb","ref":"41783","stars":null,"title":"Apache Tomcat 6/7/8/9 - Information Disclosure"}],"tier":"poc_unverified"},"has_fix":true,"headline":"Improper Input Validation in Apache Tomcat","id":"CVE-2016-6816","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"Maven","product":"apache:tomcat","products":["apache:tomcat"],"type":"xss","year":"2016"},"n_packages":10,"n_references":36,"next":{"headline":"Improper Restriction of Operations within the Bounds of a Memory Buffer in Apache Tomcat","id":"CVE-2016-6817"},"packages":[{"ecosystem":"Maven","fixed":["6.0.48"],"introduced":["6.0.0"],"last_affected":[],"package":"org.apache.tomcat:tomcat-coyote","purl":null,"source":"GHSA-jc7p-5r39-9477"},{"ecosystem":"Maven","fixed":["6.0.48"],"introduced":["6.0.0"],"last_affected":[],"package":"org.apache.tomcat:tomcat-coyote","purl":"pkg:maven/org.apache.tomcat/tomcat-coyote","source":"GHSA-jc7p-5r39-9477"},{"ecosystem":"Maven","fixed":["7.0.73"],"introduced":["7.0.0"],"last_affected":[],"package":"org.apache.tomcat:tomcat-coyote","purl":null,"source":"GHSA-jc7p-5r39-9477"},{"ecosystem":"Maven","fixed":["7.0.73"],"introduced":["7.0.0"],"last_affected":[],"package":"org.apache.tomcat:tomcat-coyote","purl":"pkg:maven/org.apache.tomcat/tomcat-coyote","source":"GHSA-jc7p-5r39-9477"},{"ecosystem":"Maven","fixed":["8.0.39"],"introduced":["8.0.0RC1"],"last_affected":[],"package":"org.apache.tomcat:tomcat-coyote","purl":null,"source":"GHSA-jc7p-5r39-9477"},{"ecosystem":"Maven","fixed":["8.0.39"],"introduced":["8.0.0RC1"],"last_affected":[],"package":"org.apache.tomcat:tomcat-coyote","purl":"pkg:maven/org.apache.tomcat/tomcat-coyote","source":"GHSA-jc7p-5r39-9477"},{"ecosystem":"Maven","fixed":["8.5.8"],"introduced":["8.5.0"],"last_affected":[],"package":"org.apache.tomcat:tomcat-coyote","purl":null,"source":"GHSA-jc7p-5r39-9477"},{"ecosystem":"Maven","fixed":["8.5.8"],"introduced":["8.5.0"],"last_affected":[],"package":"org.apache.tomcat:tomcat-coyote","purl":"pkg:maven/org.apache.tomcat/tomcat-coyote","source":"GHSA-jc7p-5r39-9477"},{"ecosystem":"Maven","fixed":["9.0.0.M12"],"introduced":["9.0.0.M1"],"last_affected":[],"package":"org.apache.tomcat:tomcat-coyote","purl":null,"source":"GHSA-jc7p-5r39-9477"},{"ecosystem":"Maven","fixed":["9.0.0.M12"],"introduced":["9.0.0.M1"],"last_affected":[],"package":"org.apache.tomcat:tomcat-coyote","purl":"pkg:maven/org.apache.tomcat/tomcat-coyote","source":"GHSA-jc7p-5r39-9477"}],"prev":{"headline":"Moderate severity vulnerability that affects org.apache.ranger:ranger","id":"CVE-2016-6815"},"products":["Apache Tomcat"],"published":"2017-03-20","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":"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":"attribution","licence":"GPL-2.0-or-later","name":"Exploit-DB"}],"ssvc":{"automatable":"no","exploitation":"none","technical_impact":"partial"},"state":"PUBLISHED","updated":"2024-11-14","vendors":["Apache Software Foundation"]},"summary":"Attackers can inject data into HTTP responses via invalid characters, enabling XSS, cache poisoning, and sensitive information disclosure in Apache Tomcat.","url":"https://insights.sbomify.com/CVE-2016-6816/"}