Incomplete cleanup in Apache Tomcat - CVE-2026-88041
Published: October 20, 2026
Vulnerability identifier: #VU156275
CSH Severity: Medium
CVSS v4: 6.3 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-88041
CWE-ID: CWE-459
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to cause HTTP/2 trailer information to cross request boundaries, potentially disclosing information or contaminating another request.
The vulnerability exists due to incomplete cleanup in Apache Tomcat HTTP/2 trailer header processing when handling successive requests. A remote attacker can trigger affected request processing to cause trailer information from a previous request to leak into a subsequent request.
Affected software
Apache Tomcat
How to mitigate CVE-2026-88041
Install security update from vendor's website.
Apache Tomcat - addressed in versions 9.0.123, 10.1.61, 11.0.27