CVE-2026-88041 Apache Tomcat: HTTP/2 trailer header cross-contamination
- Exploited in the wild
- Not known
- Fix
- Available
What is CVE-2026-88041?
CVE-2026-88041 is a high-severity vulnerability in Apache Tomcat, published on 20 Oct 2026.
Official description
Incomplete cleanup vulnerability in Apache Tomcat allowed an trailer information from a previous request to leak into a subsequent request.
This issue affects Apache Tomcat: from 11.0.0-M23 through 11.0.26, from 10.1.27 through 10.1.60, from 9.0.92 through 9.0.122.
Users are recommended to upgrade to version 11.0.27, 10.1.61 or 9.0.123, which fix the issue.
Weakness: CWE-459
Which versions are affected by CVE-2026-88041?
1 open source package ship an affected version, including tomcat.
| Package | Affected | Fixed in |
|---|---|---|
tomcat Bitnami | From 9.0.92 | 9.0.123, 10.1.61, 11.0.27 |
How do I fix CVE-2026-88041?
Upgrade tomcat to a fixed version for your release line: 9.0.123, 10.1.61 or 11.0.27.
Is CVE-2026-88041 being exploited?
There is no known exploitation of CVE-2026-88041 in the wild and no public exploit code.
Sources
Also known as BIT-tomcat-2026-88041, DEBIAN-CVE-2026-88041, GHSA-f6r2-3pj4-jmqq, UBUNTU-CVE-2026-88041.