CVE-2018-8020: Apache Tomcat Native

High severity, CVSS 7.4. EPSS: 4.1% chance of exploitation in the next 30 days.

Apache Tomcat Native 1.2.0 to 1.2.16 and 1.1.23 to 1.1.34 has a flaw that does not properly check OCSP pre-produced responses, which are lists (multiple entries) of certificate statuses. Subsequently, revoked client certificates may not be properly identified, allowing for users to authenticate with revoked certificates to connections that require mutual TLS. Users not using OCSP checks are not affected by this vulnerability.

Affected products

• Apache Tomcat Native: from 1.1.23, up to and including 1.1.34; from 1.2.0, up to and including 1.2.16
• Debian Debian Linux: version 8.0 only

Published 2018-07-31. Last modified 2026-06-17.