CVE-2026-78437
Apache Tomcat: HTTP/2 DoS via malformed request
CVSS Score
7.3
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-459 |
| Vendor | apache software foundation |
| Product | apache tomcat |
| Published | Sep 23, 2026 |
| Last Updated | Sep 23, 2026 |
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Affected Versions
Apache Software Foundation / Apache Tomcat
11.0.19 ≤ 11.0.25 10.1.53 ≤ 10.1.59 9.0.116 ≤ 9.0.121