# CVE-2025-52434: Apache Tomcat: APR/Native Connector crash leading to DoS

> CVE-2025-52434: Apache Tomcat: APR/Native Connector crash leading to DoS. CVSS 7.5 (CVSS 3.1).

Canonical: https://rewindex.com/cve/CVE-2025-52434
Last updated: 2026-06-17T09:36:29Z

- Published: 2025-07-10 19:03 UTC · Updated: 2026-06-17 09:36 UTC · Assigner: apache
- CVSS: 7.5 (CVSS 3.1) · Severity: High · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- EPSS: 2.1%, 81th percentile (scored 2026-10-25)
- CISA KEV: no
- CWE: CWE-362

## Description

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.

## Affected vendors and products

- Apache Software Foundation: Apache Tomcat

## Tracked companies

- [Bitbucket](https://rewindex.com/company/bitbucket.md)
- [Jira](https://rewindex.com/company/jira.md)

## References

- [CVE record on cve.org](https://www.cve.org/CVERecord?id=CVE-2025-52434)
- [NVD entry](https://nvd.nist.gov/vuln/detail/CVE-2025-52434)
- [https://lists.apache.org/thread/gxgh65004f25y8519coth6w7vchww030](https://lists.apache.org/thread/gxgh65004f25y8519coth6w7vchww030)

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_Sources: CVE records from the CVE Program (cve.org). CVE® is a registered trademark of The MITRE Corporation. (https://www.cve.org/) This product uses data from the NVD API but is not endorsed or certified by the NVD. (https://nvd.nist.gov/) Known Exploited Vulnerabilities catalog from CISA. (https://www.cisa.gov/known-exploited-vulnerabilities-catalog) EPSS scores from FIRST (Exploit Prediction Scoring System). (https://www.first.org/epss/)_


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Canonical: https://rewindex.com/cve/CVE-2025-52434 · Markdown: https://rewindex.com/cve/CVE-2025-52434.md · JSON: https://rewindex.com/api/v1/cves/CVE-2025-52434 · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-10-26T02:16:21.229Z