CVE-2026-88041

Apache Tomcat: HTTP/2 trailer header cross-contamination

State: Published
Severity: 7.5 High
Published: Oct 20, 2026
Updated: Oct 29, 2026
Reserved: Sep 9, 2026

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.

Scores

CVSS	Score	Vector	Source
3.1	7.5 High	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N	CISA-ADP

Weaknesses

CWE-459 Incomplete cleanup

Affected Products

Product	Versions
Apache TomcatApache Software Foundation	11.0.0-M23 through 11.0.26Affected 10.1.27 through 10.1.60Affected 9.0.92 through 9.0.122Affected

References

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