7.3High

CVE-2026-78437Apache Tomcat: HTTP/2 DoS via malformed request

Apache Software Foundation Apache Tomcat Published: (1 month ago)

Description

Incomplete cleanup vulnerability in Apache Tomcat allows a malformed request to potentially (depends on timing) cause one request from another user to fail. This issue affects Apache Tomcat: from 11.0.19 through 11.0.25, from 10.1.53 through 10.1.59, from 9.0.116 through 9.0.121. Users are recommended to upgrade to version 11.0.26, 10.1.60 or 9.0.122, which fix the issue.

Weakness (CWE): CWE-459

Data: CVE.org, NVD, CISA KEV, FIRST EPSS, Ubuntu. Published as the sources state it, in English.

Affected products and versions

VendorProductVersions
Apache Software Foundation Apache Tomcat 11.0.19 – ≤ 11.0.25, 10.1.53 – ≤ 10.1.59, 9.0.116 – ≤ 9.0.121

References and patches