{"answers":{"affected":"10 open source packages ship an affected version, including org.apache.tomcat:tomcat-util. It affects 1 product.","exploited":"There is no known exploitation of CVE-2016-8745 in the wild and no public exploit code.","fix":"Upgrade org.apache.tomcat:tomcat-util to a fixed version for your release line: 6.0.50, 7.0.75, 8.0.41 or 8.5.9.","what":"CVE-2016-8745 is a high-severity vulnerability in Apache Tomcat, published on 10 Aug 2017. An attacker can exploit it over the internet without logging in, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2016-8745 and fix it if it is affected.\n\nWhat it is: CVE-2016-8745 is a high-severity vulnerability in Apache Tomcat, published on 10 Aug 2017. 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-2016-8745 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- org.apache.tomcat:tomcat-util (Maven): affected from 6.0.16; fixed in 6.0.50\n- org.apache.tomcat:tomcat-util (Maven): affected from 6.0.16; fixed in 6.0.50\n- org.apache.tomcat:tomcat-util (Maven): affected from 7.0.0; fixed in 7.0.75\n- org.apache.tomcat:tomcat-util (Maven): affected from 7.0.0; fixed in 7.0.75\n- org.apache.tomcat:tomcat-util (Maven): affected from 8.0.0-RC1; fixed in 8.0.41\n- org.apache.tomcat:tomcat-util (Maven): affected from 8.0.0-RC1; fixed in 8.0.41\n- org.apache.tomcat:tomcat-util (Maven): affected from 8.5.0; fixed in 8.5.9\n- org.apache.tomcat:tomcat-util (Maven): affected from 8.5.0; fixed in 8.5.9\n- org.apache.tomcat:tomcat-util (Maven): affected from 9.0.0.M1; fixed in 9.0.0.M14\n- org.apache.tomcat:tomcat-util (Maven): affected from 9.0.0.M1; fixed in 9.0.0.M14\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-2016-8745/ (Markdown: https://insights.sbomify.com/CVE-2016-8745/index.md)","id":"CVE-2016-8745","markdown":"https://insights.sbomify.com/CVE-2016-8745/index.md","name":"CVE-2016-8745","record":{"aliases":["DLA-779-1","DSA-3754-1","DSA-3755-1","GHSA-w3j5-q8f2-3cqq","MGASA-2017-0050","UBUNTU-CVE-2016-8745"],"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":"An attacker can exploit a concurrency bug in the NIO connector to leak sensitive data like session IDs and response bodies between requests.","user_interaction":"not_required","vuln_class":"information_disclosure"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"apache","cpe":[{"product":"tomcat","vendor":"apache"}],"cvss":{"score":7.5,"severity":"high","source":"nvd","vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","version":"3.0"},"cwes":[{"id":"CWE-388","name":null}],"description":"A bug in the error handling of the send file code for the NIO HTTP connector in Apache Tomcat 9.0.0.M1 to 9.0.0.M13, 8.5.0 to 8.5.8, 8.0.0.RC1 to 8.0.39, 7.0.0 to 7.0.73 and 6.0.16 to 6.0.48 resulted in the current Processor object being added to the Processor cache multiple times. This in turn meant that the same Processor could be used for concurrent requests. Sharing a Processor can result in information leakage between requests including, not not limited to, session ID and the response body. The bug was first noticed in 8.5.x onwards where it appears the refactoring of the Connector code for 8.5.x onwards made it more likely that the bug was observed. Initially it was thought that the 8.5.x refactoring introduced the bug but further investigation has shown that the bug is present in all currently supported Tomcat versions.","ecosystems":["Maven"],"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":"Concurrent Execution using Shared Resource with Improper Synchronization in Apache Tomcat","id":"CVE-2016-8745","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"Maven","product":"apache:tomcat","products":["apache:tomcat"],"type":"information_disclosure","year":"2016"},"n_packages":10,"n_references":30,"next":{"headline":"Apache Ranger policy engine incorrectly matches paths in certain conditions","id":"CVE-2016-8746"},"packages":[{"ecosystem":"Maven","fixed":["6.0.50"],"introduced":["6.0.16"],"last_affected":[],"package":"org.apache.tomcat:tomcat-util","purl":null,"source":"GHSA-w3j5-q8f2-3cqq"},{"ecosystem":"Maven","fixed":["6.0.50"],"introduced":["6.0.16"],"last_affected":[],"package":"org.apache.tomcat:tomcat-util","purl":"pkg:maven/org.apache.tomcat/tomcat-util","source":"GHSA-w3j5-q8f2-3cqq"},{"ecosystem":"Maven","fixed":["7.0.75"],"introduced":["7.0.0"],"last_affected":[],"package":"org.apache.tomcat:tomcat-util","purl":null,"source":"GHSA-w3j5-q8f2-3cqq"},{"ecosystem":"Maven","fixed":["7.0.75"],"introduced":["7.0.0"],"last_affected":[],"package":"org.apache.tomcat:tomcat-util","purl":"pkg:maven/org.apache.tomcat/tomcat-util","source":"GHSA-w3j5-q8f2-3cqq"},{"ecosystem":"Maven","fixed":["8.0.41"],"introduced":["8.0.0-RC1"],"last_affected":[],"package":"org.apache.tomcat:tomcat-util","purl":null,"source":"GHSA-w3j5-q8f2-3cqq"},{"ecosystem":"Maven","fixed":["8.0.41"],"introduced":["8.0.0-RC1"],"last_affected":[],"package":"org.apache.tomcat:tomcat-util","purl":"pkg:maven/org.apache.tomcat/tomcat-util","source":"GHSA-w3j5-q8f2-3cqq"},{"ecosystem":"Maven","fixed":["8.5.9"],"introduced":["8.5.0"],"last_affected":[],"package":"org.apache.tomcat:tomcat-util","purl":null,"source":"GHSA-w3j5-q8f2-3cqq"},{"ecosystem":"Maven","fixed":["8.5.9"],"introduced":["8.5.0"],"last_affected":[],"package":"org.apache.tomcat:tomcat-util","purl":"pkg:maven/org.apache.tomcat/tomcat-util","source":"GHSA-w3j5-q8f2-3cqq"},{"ecosystem":"Maven","fixed":["9.0.0.M14"],"introduced":["9.0.0.M1"],"last_affected":[],"package":"org.apache.tomcat:tomcat-util","purl":null,"source":"GHSA-w3j5-q8f2-3cqq"},{"ecosystem":"Maven","fixed":["9.0.0.M14"],"introduced":["9.0.0.M1"],"last_affected":[],"package":"org.apache.tomcat:tomcat-util","purl":"pkg:maven/org.apache.tomcat/tomcat-util","source":"GHSA-w3j5-q8f2-3cqq"}],"prev":{"headline":"Deserialization of Untrusted Data in Apache Brooklyn","id":"CVE-2016-8744"},"products":["Apache Tomcat"],"published":"2017-08-10","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)"}],"ssvc":{"automatable":"yes","exploitation":"none","technical_impact":"partial"},"state":"PUBLISHED","updated":"2024-11-14","vendors":["Apache Software Foundation"]},"summary":"An attacker can exploit a concurrency bug in the NIO connector to leak sensitive data like session IDs and response bodies between requests.","url":"https://insights.sbomify.com/CVE-2016-8745/"}