{"id":"CVE-2023-34981","aliases":["BIT-tomcat-2023-34981","GHSA-mppv-79ch-vw6q"],"url":"https://o3.security/vulnerability/CVE-2023-34981","summary":"Apache Tomcat: AJP response header mix-up","details":"A regression in the fix for bug 66512 in Apache Tomcat 11.0.0-M5, 10.1.8, 9.0.74 and 8.5.88 meant that, if a response did not include any HTTP headers no AJP SEND_HEADERS messare woudl be sent for the response which in turn meant that at least one AJP proxy (mod_proxy_ajp) would use the response headers from the previous request leading to an information leak.","published":"2023-06-21T10:26:16.916Z","modified":"2026-08-12T03:51:23.565626437Z","cvss":{"score":7.5,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N"},"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Maven","name":"org.apache.tomcat.embed:tomcat-embed-core","fixedVersion":"11.0.0-M6"},{"ecosystem":"Maven","name":"org.apache.tomcat.embed:tomcat-embed-core","fixedVersion":"10.1.9"},{"ecosystem":"Maven","name":"org.apache.tomcat.embed:tomcat-embed-core","fixedVersion":"9.0.75"},{"ecosystem":"Maven","name":"org.apache.tomcat:tomcat-coyote","fixedVersion":"8.5.89"}],"fix":{"url":"https://github.com/apache/tomcat/commit/2214c8030522aa9b2a367dfa5d9acff1a03666ae","label":"apache/tomcat@2214c80"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/34xxx/CVE-2023-34981.json"},{"type":"ADVISORY","url":"https://lists.apache.org/thread/j1ksjh9m9gx1q60rtk1sbzmxhvj5h5qz"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2023-34981"},{"type":"ADVISORY","url":"https://security.netapp.com/advisory/ntap-20230714-0003/"},{"type":"WEB","url":"https://github.com/apache/tomcat/commit/2214c8030522aa9b2a367dfa5d9acff1a03666ae"},{"type":"WEB","url":"https://github.com/apache/tomcat/commit/2f0ca2378415f4cf0748f4bc8fa955f41f803fa5"},{"type":"WEB","url":"https://github.com/apache/tomcat/commit/739c7381aed22b7636351caf885ddc519ab6b442"},{"type":"WEB","url":"https://github.com/apache/tomcat/commit/f0742f47b98aca943097f7f88e0d1163f57527e3"},{"type":"WEB","url":"https://bz.apache.org/bugzilla/show_bug.cgi?id=66512"},{"type":"WEB","url":"https://bz.apache.org/bugzilla/show_bug.cgi?id=66591"},{"type":"PACKAGE","url":"https://github.com/apache/tomcat"},{"type":"WEB","url":"https://security.netapp.com/advisory/ntap-20230714-0003"},{"type":"WEB","url":"https://tomcat.apache.org/security-10.html"},{"type":"WEB","url":"https://tomcat.apache.org/security-11.html"},{"type":"WEB","url":"https://tomcat.apache.org/security-8.html"},{"type":"WEB","url":"https://tomcat.apache.org/security-9.html"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-12T03:51:23.565626437Z"}}