CVE-2018-8020

CVE-2018-8020: vulnerability in Apache Tomcat Native

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3Vexday Risk Score

No sign of exploitation. No public exploitation artifact known so far.

ssvc Trackepss 4.2%
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 Software Foundation · Apache Tomcat Native
Related CVEs — Apache Tomcat Native

In the same product, most dangerous first.

CVE-2018-8019—CVE-2018-8019EPSS 4.0%CVE-2017-15698—CVE-2017-15698EPSS 3.5%CVE-2026-29145CRITICALApache Tomcat, Apache Tomcat Native: OCSP checks sometimes soft-fail even when soft-fail is disabledEPSS 0.7%CVE-2026-24734HIGHApache Tomcat Native, Apache Tomcat: OCSP revocation bypassEPSS 0.6%CVE-2026-86243HIGHApache Tomcat Native: DoS via TLS handshakeEPSS 0.6%CVE-2026-86246CRITICALApache Tomcat Native: Insecure OpenSSL options enabledEPSS 0.3%