CVE-2026-78437
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.
- Published Sep 23, 2026
- CVSS 7.3 high
- 0.3% chance of exploitation in the next 30 days (EPSS)
- A fix is available