CVE-2026-101356

EUVD-2026-105011
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.
Race Condition
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
apacheCNA
9.1 CRITICAL
NETWORK
LOW
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
Base Score
CVSS 3.x
EPSS Score
Percentile: 43.14%
Early Detection
Affected products identified ahead of NVD analysis through intelligence sources.
VendorProductVersionSource
apachetomcat
11.0.22 ≤
𝑥
≤ 11.0.26
CNA
apachetomcat
10.1.55 ≤
𝑥
≤ 10.1.60
CNA
apachetomcat
9.0.118 ≤
𝑥
≤ 9.0.122
CNA
Debian logo
Debian Releases
Debian Product
Codename
tomcat10
bookworm
vulnerable
bookworm (security)
vulnerable
forky
vulnerable
sid
vulnerable
trixie
vulnerable
trixie (security)
vulnerable
tomcat11
forky
vulnerable
sid
vulnerable
trixie
vulnerable
trixie (security)
vulnerable
tomcat9
bookworm
9.0.70-2
fixed
forky
9.0.122-1
fixed
sid
9.0.122-1
fixed
trixie
9.0.95-1
fixed
Common Weakness Enumeration
Vulnerability Media Exposure
References
https://lists.apache.org/thread.html/d1xjt7bbjqw7y7n5mcb4fm815hpfgc27
http://www.openwall.com/lists/oss-security/2026/10/20/27