GHSA-4j3c-42xv-3f84
Apache Tomcat is vulnerable to resource exhaustion when using the APR/Native connector
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.
This issue affects Apache Tomcat: from 9.0.0.M1 through 9.0.106. The following versions were EOL at the time the CVE was created but are known to be affected: 8.5.0 through 8.5.100. Other, older, EOL versions may also be affected.
Users are recommended to upgrade to version 9.0.107, which fixes the issue.
Are you affected?
Enter the version of the package you're using.
Affected packages
9.0.0.M1 Fixed in: 9.0.107 # pom.xml: bump <version>9.0.107</version> for org.apache.tomcat:tomcat-coyote 8.5.0 No fixed version published yet for org.apache.tomcat:tomcat-coyote (maven). Pin to a known-safe version or switch to an alternative.
9.0.0.M1 Fixed in: 9.0.107 # pom.xml: bump <version>9.0.107</version> for org.apache.tomcat.embed:tomcat-embed-core 8.5.0 No fixed version published yet for org.apache.tomcat.embed:tomcat-embed-core (maven). Pin to a known-safe version or switch to an alternative.
References
- https://nvd.nist.gov/vuln/detail/CVE-2025-52434 [ADVISORY]
- https://github.com/apache/tomcat/commit/8a83c3c42d20762782678932c14005cd3397a018 [WEB]
- https://github.com/apache/tomcat [PACKAGE]
- https://lists.apache.org/thread/gxgh65004f25y8519coth6w7vchww030 [WEB]
- https://lists.debian.org/debian-lts-announce/2025/07/msg00009.html [WEB]
- http://www.openwall.com/lists/oss-security/2025/07/10/11 [WEB]