CVE-2022-25762 Response mix-up with WebSocket concurrent send and close

What is CVE-2022-25762?

CVE-2022-25762 is a high-severity vulnerability in Apache Tomcat, published on 13 May 2022. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

If a web application sends a WebSocket message concurrently with the WebSocket connection closing when running on Apache Tomcat 8.5.0 to 8.5.75 or Apache Tomcat 9.0.0.M1 to 9.0.20, it is possible that the application will continue to use the socket after it has been closed. The error handling triggered in this case could cause the a pooled object to be placed in the pool twice. This could result in subsequent connections using the same object concurrently which could result in data being returned to the wrong use and/or other errors.

Weakness: CWE-404

Which versions are affected by CVE-2022-25762?

5 open source packages ship an affected version, including org.apache.tomcat:tomcat and tomcat. It affects 2 products.

Products include Apache Tomcat, Oracle Agile Product Lifecycle Management.

How do I fix CVE-2022-25762?

Upgrade org.apache.tomcat:tomcat to a fixed version for your release line: 8.5.75 or 9.0.20.

Is CVE-2022-25762 being exploited?

There is no known exploitation of CVE-2022-25762 in the wild and no public exploit code.

Other vulnerabilities in Apache Tomcat

• CVE-2025-24813 Apache Tomcat Path Equivalence Exploited Critical 10.0
• CVE-2016-8735 Apache Tomcat Remote Code Execution Exploited Critical 9.8
• CVE-2017-12617 Apache Tomcat Remote Code Execution Exploited High 8.1
• CVE-2017-12615 Apache Tomcat on Windows Remote Code Execution Exploited High 8.1
• CVE-2026-34486 Apache Tomcat Missing Encryption of Sensitive Data Exploited High 7.5

All Apache Tomcat vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as BIT-tomcat-2022-25762, DEBIAN-CVE-2022-25762, GHSA-h3ch-5pp2-vh6w, UBUNTU-CVE-2022-25762.