CVE-2023-42795: Apache Tomcat

Medium severity, CVSS 5.3. EPSS: 2.2% chance of exploitation in the next 30 days.

Incomplete Cleanup vulnerability in Apache Tomcat.When recycling various internal objects in Apache Tomcat from 11.0.0-M1 through 11.0.0-M11, from 10.1.0-M1 through 10.1.13, from 9.0.0-M1 through 9.0.80 and from 8.5.0 through 8.5.93, an error could cause Tomcat to skip some parts of the recycling process leading to information leaking from the current request/response to the next. Older, EOL versions may also be affected. Users are recommended to upgrade to version 11.0.0-M12 onwards, 10.1.14 onwards, 9.0.81 onwards or 8.5.94 onwards, which fixes the issue.

Affected products

• Apache Tomcat: from 8.5.0, before 8.5.94 (fixed in 8.5.94); from 9.0.1, before 9.0.81 (fixed in 9.0.81); from 10.1.1, before 10.1.14 (fixed in 10.1.14); version 9.0.0 only; version 10.1.0 only; version 11.0.0 only
• Debian Debian Linux: version 10.0 only; version 11.0 only; version 12.0 only

Published 2023-10-10. Last modified 2026-06-17.