CVE-2026-73581

Apache Tomcat is vulnerable to an Improper Check for Certificate Revocation issue in both the OpenSSL and OpenSSL-FFM TLS implementations. The root cause is that these implementations ignore Certificate Revocation Lists (CRLs) when a certificate is used with a keystore . This affects versions 11....

EUVD-2026-85222

Improper Check for Certificate Revocation vulnerability in Apache Tomcat. Both the OpenSSL and OpenSSL-FFM TLS implementations ignore CRLs when certificate uses a keystore. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.25, from 10.1.0-M1 through 10.1.58, from 9.0.0-M1 through...

CVE-2026-73581

Improper Check for Certificate Revocation vulnerability in Apache Tomcat. Both the OpenSSL and OpenSSL-FFM TLS implementations ignore CRLs when certificate uses a keystore. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.25, from 10.1.0-M1 through 10.1.59, from 9.0.0-M1 through...

rustls-webpki: rustls-webpki: Denial of Service via crafted Certificate Revocation List

A flaw was found in rustls-webpki. A remote attacker, by influencing an application to parse a specially crafted Certificate Revocation List CRL that contains an empty onlySomeReasons value in its issuingDistributionPoint extension, could trigger a panic. This vulnerability leads to a denial of...

CVE-2026-73581: Improper Check for Certificate Revocation

Improper Check for Certificate Revocation vulnerability in Apache Tomcat. Both the OpenSSL and OpenSSL-FFM TLS implementations ignore CRLs when certificate uses a keystore. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.25, from 10.1.0-M1 through 10.1.59, from 9.0.0-M1 through...

Apache Tomcat 10.1.0.M1 < 10.1.60 multiple vulnerabilities

The version of Tomcat installed on the remote host is prior to 10.1.60. It is, therefore, affected by multiple vulnerabilities as referenced in the fixedinapachetomcat10.1.60security-10 advisory. - CLIENTCERT authentication does not fail as expected for some scenarios when soft fail is disabled...

Apache Tomcat 9.0.0.M1 < 9.0.122 multiple vulnerabilities

The version of Tomcat installed on the remote host is prior to 9.0.122. It is, therefore, affected by multiple vulnerabilities as referenced in the fixedinapachetomcat9.0.122security-9 advisory. - CLIENTCERT authentication does not fail as expected for some scenarios when soft fail is disabled...

Apache Tomcat 11.0.0.M1 < 11.0.26 multiple vulnerabilities

The version of Tomcat installed on the remote host is prior to 11.0.26. It is, therefore, affected by multiple vulnerabilities as referenced in the fixedinapachetomcat11.0.26security-11 advisory. - CLIENTCERT authentication does not fail as expected for some scenarios when soft fail is disabled...

io.netty/netty-handler-ssl-ocsp: Netty: Certificate revocation bypass via OCSP response replay attack

A flaw was found in Netty. The OcspClient component fails to validate that the Certificate ID in an Online Certificate Status Protocol OCSP response matches the requested Certificate ID. This vulnerability allows a remote attacker to bypass certificate revocation checks by presenting a legitimate...

CVE-2026-93578

A flaw was found in Netty's Online Certificate Status Protocol OCSP Client. The client fails to verify the 'id-kp-OCSPSigning' Extended Key Usage EKU in OCSP responder certificates. A remote attacker, holding any valid certificate issued by the same Certificate Authority CA, can exploit this by...

EUVD-2026-82871

A flaw was found in Netty's Online Certificate Status Protocol OCSP Client. The client fails to verify the 'id-kp-OCSPSigning' Extended Key Usage EKU in OCSP responder certificates. A remote attacker, holding any valid certificate issued by the same Certificate Authority CA, can exploit this by...

CVE-2026-93578 Io.netty/netty-handler-ssl-ocsp: netty: missing extended key usage (eku) check in ocsp client allows certificate revocation bypass

A flaw was found in Netty's Online Certificate Status Protocol OCSP Client. The client fails to verify the 'id-kp-OCSPSigning' Extended Key Usage EKU in OCSP responder certificates. A remote attacker, holding any valid certificate issued by the same Certificate Authority CA, can exploit this by...

CVE-2026-93602: Improper Check for Certificate Revocation

rustls-webpki versions before 0.103.10 and 0.104.0-alpha.5 contain faulty CRL authority-matching logic that compares only the first distributionPoint against each CRL's IssuingDistributionPoint, ignoring additional distributionPoints. Attackers with a compromised trusted issuing authority can...

CVE-2026-93578: Undefined Security Weakness

A flaw was found in Netty's Online Certificate Status Protocol OCSP Client. The client fails to verify the 'id-kp-OCSPSigning' Extended Key Usage EKU in OCSP responder certificates. A remote attacker, holding any valid certificate issued by the same Certificate Authority CA, can exploit this by...

CVE-2026-93493: Improper Check for Certificate Revocation

A flaw was found in Netty's netty-handler-ssl-ocsp component. A remote attacker can exploit this vulnerability by providing an Online Certificate Status Protocol OCSP response that omits the optional nextUpdate field. This omission causes the OCSP validation to be silently skipped, leading to...

tomcat: Apache Tomcat: Error condition not handled when configuring CRLs

A flaw was found in Apache Tomcat. When configuring Certificate Revocation Lists CRLs for a FFM presumably a specific type of connector, the system fails to detect and act upon an error condition. This oversight could lead to unexpected behavior or a security bypass, as the intended security...

tomcat: Apache Tomcat: Error condition not handled when configuring CRLs

A flaw was found in Apache Tomcat. When configuring Certificate Revocation Lists CRLs for a FFM presumably a specific type of connector, the system fails to detect and act upon an error condition. This oversight could lead to unexpected behavior or a security bypass, as the intended security...

tomcat: Apache Tomcat: TLS implementations ignore Certificate Revocation Lists

A flaw was found in Apache Tomcat. Both the OpenSSL and OpenSSL-FFM Transport Layer Security TLS implementations fail to properly check Certificate Revocation Lists CRLs when a certificate uses a keystore. This oversight could allow an attacker to use a revoked certificate, potentially leading to...

tomcat: Apache Tomcat: TLS implementations ignore Certificate Revocation Lists

A flaw was found in Apache Tomcat. Both the OpenSSL and OpenSSL-FFM Transport Layer Security TLS implementations fail to properly check Certificate Revocation Lists CRLs when a certificate uses a keystore. This oversight could allow an attacker to use a revoked certificate, potentially leading to...

PT-2026-97281

Name of the Vulnerable Software and Affected Versions Apache Tomcat versions 11.0.0-M1 through 11.0.25 Apache Tomcat versions 10.1.0-M1 through 10.1.58 Apache Tomcat versions 9.0.0-M1 through 9.0.121 Apache Tomcat versions 8.5.0 through 8.5.100 Description An improper check for certificate...