{"answers":{"affected":"5 open source packages ship an affected version, including org.apache.tomcat:tomcat-coyote and tomcat. It affects 1 product.","exploited":"There is no known exploitation of CVE-2023-42794 in the wild and no public exploit code.","fix":"Upgrade org.apache.tomcat:tomcat-coyote to a fixed version for your release line: 8.5.94 or 9.0.81.","what":"CVE-2023-42794 is a medium-severity denial of service vulnerability in Apache Tomcat, published on 10 Oct 2023. An attacker can exploit it over the internet without logging in, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2023-42794 and fix it if it is affected.\n\nWhat it is: CVE-2023-42794 is a medium-severity denial of service vulnerability in Apache Tomcat, published on 10 Oct 2023. 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-2023-42794 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- org.apache.tomcat:tomcat-coyote (Maven): affected from 8.5.85; fixed in 8.5.94\n- org.apache.tomcat:tomcat-coyote (Maven): affected from 8.5.85; fixed in 8.5.94\n- org.apache.tomcat:tomcat-coyote (Maven): affected from 9.0.70; fixed in 9.0.81\n- org.apache.tomcat:tomcat-coyote (Maven): affected from 9.0.70; fixed in 9.0.81\n- tomcat (Bitnami): affected from 8.5.85; fixed in 8.5.94, 9.0.81\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-2023-42794/ (Markdown: https://insights.sbomify.com/CVE-2023-42794/index.md)","id":"CVE-2023-42794","markdown":"https://insights.sbomify.com/CVE-2023-42794/index.md","name":"CVE-2023-42794","record":{"aliases":["BIT-tomcat-2023-42794","CLSA-2025-1739387851","GHSA-jm7m-8jh6-29hp"],"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 by filling the disk with temporary files on Windows due to incomplete cleanup of uploaded files.","user_interaction":"not_required","vuln_class":"denial_of_service"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"apache","cpe":[{"product":"tomcat","vendor":"apache"}],"cvss":{"score":5.9,"severity":"medium","source":"nvd","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H","version":"3.1"},"cwes":[{"id":"CWE-459","name":"Incomplete Cleanup"}],"description":"Incomplete Cleanup vulnerability in Apache Tomcat.\n\nThe internal fork of Commons FileUpload packaged with Apache Tomcat 9.0.70 through 9.0.80 and 8.5.85 through 8.5.93 included an unreleased, \nin progress refactoring that exposed a potential denial of service on \nWindows if a web application opened a stream for an uploaded file but \nfailed to close the stream. The file would never be deleted from disk \ncreating the possibility of an eventual denial of service due to the \ndisk being full.\n\nOther, EOL versions may also be affected.\n\nUsers are recommended to upgrade to version 9.0.81 onwards or 8.5.94 onwards, which fixes the issue.","ecosystems":["Bitnami","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":"Apache Tomcat: FileUpload: DoS due to accumulation of temporary files on Windows","id":"CVE-2023-42794","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"Bitnami","product":"apache:tomcat","products":["apache:tomcat"],"type":"denial_of_service","year":"2023"},"n_packages":5,"n_references":1,"next":{"headline":"Apache Tomcat: Failure during request clean-up leads to sensitive data leaking to subsequent requests","id":"CVE-2023-42795"},"packages":[{"ecosystem":"Bitnami","fixed":["8.5.94","9.0.81"],"introduced":["8.5.85","9.0.70"],"last_affected":[],"package":"tomcat","purl":"pkg:bitnami/tomcat","source":"BIT-tomcat-2023-42794"},{"ecosystem":"Maven","fixed":["8.5.94"],"introduced":["8.5.85"],"last_affected":[],"package":"org.apache.tomcat:tomcat-coyote","purl":null,"source":"GHSA-jm7m-8jh6-29hp"},{"ecosystem":"Maven","fixed":["8.5.94"],"introduced":["8.5.85"],"last_affected":[],"package":"org.apache.tomcat:tomcat-coyote","purl":"pkg:maven/org.apache.tomcat/tomcat-coyote","source":"GHSA-jm7m-8jh6-29hp"},{"ecosystem":"Maven","fixed":["9.0.81"],"introduced":["9.0.70"],"last_affected":[],"package":"org.apache.tomcat:tomcat-coyote","purl":null,"source":"GHSA-jm7m-8jh6-29hp"},{"ecosystem":"Maven","fixed":["9.0.81"],"introduced":["9.0.70"],"last_affected":[],"package":"org.apache.tomcat:tomcat-coyote","purl":"pkg:maven/org.apache.tomcat/tomcat-coyote","source":"GHSA-jm7m-8jh6-29hp"}],"prev":{"headline":"JetBrains TeamCity Authentication Bypass","id":"CVE-2023-42793"},"products":["Apache Tomcat"],"published":"2023-10-10","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":"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":"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":"2026-10-08","vendors":["Apache Software Foundation"]},"summary":"An attacker can cause a denial of service by filling the disk with temporary files on Windows due to incomplete cleanup of uploaded files.","url":"https://insights.sbomify.com/CVE-2023-42794/"}