CVE-2026-101356

Public on 2026-10-20

Modified on 2026-10-22

Description

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.

Severity

Medium

See what this means

CVSS v3 Base Score

4.8

See breakdown

Affected Packages

Platform	Package	Status
Amazon Linux 2 - Tomcat9 Extra	tomcat	Pending Fix
Amazon Linux 2 - Core	tomcat	Not Affected
Amazon Linux 2023	tomcat10	Pending Fix
Amazon Linux 2027 Preview	tomcat10	Pending Fix
Amazon Linux 2023	tomcat11	Pending Fix
Amazon Linux 2023	tomcat9	Pending Fix
Amazon Linux 2027 Preview	tomcat9	Pending Fix

CVSS Scores

	Score Type	Score	Vector
Amazon Linux	CVSSv3	4.8	CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N

References

FAQs regarding Amazon Linux ALAS/CVE Severity Red Hat: CVE-2026-101356 Mitre: CVE-2026-101356