Quick answers
- Is CVE-2026-88041 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-88041 being exploited in the wild.
- How severe is CVE-2026-88041?
- Informational severity, published 20 October 2026.
- Which products and versions are affected?
- Apache Tomcat 11.0.0-M23 through 11.0.26, 10.1.27 through 10.1.60, 9.0.92 through 9.0.122.
- Is there a fix for CVE-2026-88041?
- Yes: fixed in 11.0.27, 10.1.61, 9.0.123. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
- How is CVE-2026-88041 attacked?
- It is attacked over the network.
- Am I affected by CVE-2026-88041?
- Check whether you run Apache Tomcat at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
How to fix
- Fixed in: 11.0.27, 10.1.61, 9.0.123
Technical details
This is an information disclosure vulnerability affecting HTTP request processing in Apache Tomcat due to insufficient cleanup of trailer fields between requests. The vulnerability exists in versions 11.0.0-M23 through 11.0.26, 10.1.27 through 10.1.60, and 9.0.92 through 9.0.122, and requires an attacker to make sequential HTTP requests to trigger the leak. The attack is network-based with no authentication or user interaction required.
Affected products
- Apache Tomcat 11.0.0-M23 through 11.0.26, 10.1.27 through 10.1.60, 9.0.92 through 9.0.122
Timeline
- 2026-10-20: disclosed