CVE-2026-88041 Apache Tomcat - HTTP/2 trailer header cross-contamination
Severity: Low
Vendor: The Apache Software Foundation
Versions Affected:
Apache Tomcat 11.0.0-M23 to 11.0.26
Apache Tomcat 10.1.27 to 10.1.60
Apache Tomcat 9.0.92 to 9.0.122
Description:
Incomplete cleanup vulnerability in Apache Tomcat allowed an trailer
information from a previous request to leak into a subsequent request.
Mitigation:
Users of the affected versions should apply one of the following
mitigations:
- Upgrade to Apache Tomcat 11.0.27
- Upgrade to Apache Tomcat 10.1.61
- Upgrade to Apache Tomcat 9.0.123
Credit:
This issue was identified by:
- Wentao He
History:
2026-10-20 Original advisory
References:
[1] https://tomcat.apache.org/security-11.html
[2] https://tomcat.apache.org/security-10.html
[3] https://tomcat.apache.org/security-9.html
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