CVE-2026-101356 — Apache Tomcat: HTTP/2 request/response mix-up after error during async processing

Description (CNA)

Incorrect object recycling and re-use vulnerability in Apache Tomcat affecting HTTP/2 processing of asynchronous servlets can trigger request and/or response mix-up between users. This issue affects Apache Tomcat: from 11.0.22 through 11.0.26, from 10.1.55 through 10.1.60, from 9.0.118 through 9.0.122. Users are recommended to upgrade to version 11.0.27, 10.1.61 or 9.0.123, which fixes the issue.

Affected (CNA)

Vendor / product	Versions
Apache Software Foundation / Apache Tomcat	affected 11.0.22 through 11.0.26; affected 10.1.55 through 10.1.60; affected 9.0.118 through 9.0.122

CWE

No CWE identifiers supplied.

References

https://lists.apache.org/thread.html/d1xjt7bbjqw7y7n5mcb4fm815hpfgc27

ADP enrichment

CVE

No English description supplied.

http://www.openwall.com/lists/oss-security/2026/10/20/27

CISA-ADP

No English description supplied.

No references supplied.