{"id":"CVE-2025-52434","aliases":["BIT-tomcat-2025-52434","GHSA-4j3c-42xv-3f84"],"url":"https://o3.security/vulnerability/CVE-2025-52434","summary":"Apache Tomcat: APR/Native Connector crash leading to DoS","details":"Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition') vulnerability in Apache Tomcat when using the APR/Native connector. This was particularly noticeable with client initiated closes of HTTP/2 connections.\n\nThis issue affects Apache Tomcat: from 9.0.0.M1 through 9.0.106.\nThe following versions were EOL at the time the CVE was created but are \nknown to be affected: 8.5.0 through 8.5.100. Other, older, EOL versions \nmay also be affected.\n\n\nUsers are recommended to upgrade to version 9.0.107, which fixes the issue.","published":"2025-07-10T19:03:47.225Z","modified":"2026-08-12T03:51:44.968958091Z","cvss":{"score":7.5,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},"epss":{"score":0.01909,"percentile":0.78777,"asOf":"2026-09-17"},"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Maven","name":"org.apache.tomcat:tomcat-coyote","fixedVersion":"9.0.107"},{"ecosystem":"Maven","name":"org.apache.tomcat:tomcat-coyote","fixedVersion":null},{"ecosystem":"Maven","name":"org.apache.tomcat.embed:tomcat-embed-core","fixedVersion":"9.0.107"},{"ecosystem":"Maven","name":"org.apache.tomcat.embed:tomcat-embed-core","fixedVersion":null}],"fix":{"url":"https://github.com/apache/tomcat/commit/8a83c3c42d20762782678932c14005cd3397a018","label":"apache/tomcat@8a83c3c"},"references":[{"type":"WEB","url":"http://www.openwall.com/lists/oss-security/2025/07/10/11"},{"type":"WEB","url":"https://lists.debian.org/debian-lts-announce/2025/07/msg00009.html"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/52xxx/CVE-2025-52434.json"},{"type":"ADVISORY","url":"https://lists.apache.org/thread/gxgh65004f25y8519coth6w7vchww030"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2025-52434"},{"type":"WEB","url":"https://github.com/apache/tomcat/commit/8a83c3c42d20762782678932c14005cd3397a018"},{"type":"PACKAGE","url":"https://github.com/apache/tomcat"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-12T03:51:44.968958091Z"}}