CVE-2025-52434: Apache Tomcat Utilities is vulnerable to resource exhaustion when using the APR/Native connector

July 10, 2025 (updated August 8, 2025)

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.

References

github.com/advisories/GHSA-4j3c-42xv-3f84
github.com/apache/tomcat
github.com/apache/tomcat/commit/8a83c3c42d20762782678932c14005cd3397a018
lists.apache.org/thread/gxgh65004f25y8519coth6w7vchww030
nvd.nist.gov/vuln/detail/CVE-2025-52434

Code Behaviors & Features

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