All vulnerabilities
CVE-2026-88041

Apache Tomcat: HTTP/2 trailer header cross-contamination

Apache Software Foundation Apache TomcatWeb servers
Open in ThreatlineRecord JSON
CVSS
NoneNot scored
ExploitationNo known exploitationNot in CISA KEV, which does not prove it is unexploitedCISA KEV
Exploit odds (EPSS)0.26%Chance of exploitation activity in the next 30 days, higher than 16% of CVEs. Scored 23 Oct 2026FIRST EPSS
Fixed inNone listedNo source names a fixed version. Check the vendor advisory below
Published20 Oct 2026Updated 20 Oct 2026CVE List

What fixes it

No source in this snapshot names a fixed version. The vendor advisories under References are the place to check.

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.

Text from CVE List

Affected versions 3

  • Apache Tomcataffected: 11.0.0-M23 through 11.0.26CVE List
  • Apache Tomcataffected: 10.1.27 through 10.1.60CVE List
  • Apache Tomcataffected: 9.0.92 through 9.0.122CVE List

References 1