CVE-2026-101356

9.1 CRITICAL 0.5% exploit odds Fix listed Memory safety Web app

What it is

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.

At a glance

Exploitability: Can be exploited over the network without logging in. High risk of data exposure, service disruption.
Exploit odds: 0.5% chance of exploitation in the next 30 days (EPSS).
Fix: A patch, advisory or fixed version is referenced. Upgrade or apply it.

Timeline

2026-10-20 14:16 UTC PublishedDisclosed publicly on CVE.org and NVD
2026-10-20 19:35 UTC Last updatedMost recent change to the record

Details

Published: 2026-10-20 14:16 UTC
Last modified: 2026-10-20 19:35 UTC
Exploit probability: 0.5% · EPSS, next 30 days
Weakness: CWE-362 · Race condition
Record status: Awaiting Analysis

Attack profile CVSS 3.1 · 9.1

Attack vector: Network
Complexity: Low
Privileges needed: None
User interaction: None
Scope: Unchanged
Confidentiality: High
Integrity: None
Availability: High

Raw vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H

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References

NVD record · CVE.org record