crypto/x509: golang: golang crypto/x509: Denial of Service via excessive processing of DNS SAN entries

A flaw was found in the crypto/x509 package of golang. This vulnerability allows a remote attacker to cause a Denial of Service DoS by presenting a specially crafted X.509 certificate with a large number of DNS Subject Alternative Name SAN entries. The certificate verification process, specifical...

RHEL 7 : host-metering (RHSA-2026:53416)

The remote Redhat Enterprise Linux 7 host has packages installed that are affected by a vulnerability as referenced in the RHSA-2026:53416 advisory. Host metering service Security Fixes: crypto/x509: golang: golang crypto/x509: Denial of Service via excessive processing of DNS SAN entries...

openjdk: Improve certification checking (Oracle CPU 2026-07)

A flaw was found in OpenJDK. OpenJDK can apply two different security meanings to the same wildcard dNSName SAN across certificate policy enforcement and hostname verification. During path validation, DNSName.constrains compares .foo.com and secret.foo.com literally and returns NAMESAMETYPE, so...

crypto/x509: golang: Go crypto/x509: Certificate validation bypass due to incorrect DNS constraint application

A flaw was found in the crypto/x509 package within Go golang. When verifying a certificate chain, excluded DNS Domain Name System constraints are not correctly applied to wildcard DNS Subject Alternative Names SANs if the case of the SAN differs from the constraint. This oversight could allow an...

CVE-2026-64655 GitHub CLI: Attestation Verification Bypass via Unescaped Regex Metacharacters in SAN Matching

GitHub CLI gh is GitHub’s official command line tool. Prior to 2.97.0, gh attestation verify builds the certificate Subject Alternative Name matcher from the --signer-repo and --signer-workflow flag values without escaping regex metacharacters, so a user-supplied repository or workflow name is...

CVE-2026-64655

GitHub CLI (gh) prior to v2.97.0 builds the certificate Subject Alternative Name matcher from --signer-repo and --signer-workflow values without escaping regex metacharacters, causing user-supplied names to be treated as regular expressions. Because characters like '.' can appear in repository/wo...

RHEL 10 : yggdrasil (RHSA-2026:51187)

The remote Redhat Enterprise Linux 10 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2026:51187 advisory. yggdrasil is a system daemon that subscribes to topics on an MQTT broker and routes any data received on the topics to an appropriate chil...

CVE-2026-55996 Unauthenticated Denial-of-Service via TLS SAN Stuffing in Rancher and cattle-cluster-agent

A denial-of-service vulnerability was identified in multiple TLS listeners in Rancher. Both the cattle-cluster-agent component running in downstream clusters and the Rancher server itself use the dynamiclistener library to serve TLS traffic. Without an effective CN filter configured,...

CVE-2026-55996 Unauthenticated Denial-of-Service via TLS SAN Stuffing in Rancher and cattle-cluster-agent

A denial-of-service vulnerability was identified in multiple TLS listeners in Rancher. Both the cattle-cluster-agent component running in downstream clusters and the Rancher server itself use the dynamiclistener library to serve TLS traffic. Without an effective CN filter configured,...

EUVD-2026-52685

Missing Authorization vulnerability in HAVELSAN Inc. Liman MYS allows Accessing Functionality Not Properly Constrained by ACLs. This issue affects Liman MYS: from 2.2.3 before 2.3.1...

Improper Certificate Validation

Overview Affected versions of this package are vulnerable to Improper Certificate Validation in the DNSConstraint::matches. An attacker can bypass name constraints by presenting a certificate with a wildcard DNS Subject Alternative Name that is improperly validated, allowing acceptance of...

CVE-2026-69248

cryptography is a package designed to expose cryptographic primitives and recipes to Python developers. In versions 45.0.0 through 48.0.0, if an intermediate constrained CA permits the DNS name foo.example.com, and the leaf certificate has a wildcard in its DNS SAN of .example.com,...

Important: Red Hat Security Advisory: Red Hat OpenShift Service Mesh 3.4.1

Red Hat OpenShift Service Mesh 3.4.1 This update has a security impact of Important. A Common Vulnerability Scoring System CVSS base score, which gives a detailed severity rating, is available for each vulnerability from the CVE links in the References section. Red Hat OpenShift Service Mesh 3.4....

crypto/x509: golang: golang crypto/x509: Denial of Service via excessive processing of DNS SAN entries

A flaw was found in the crypto/x509 package of golang. This vulnerability allows a remote attacker to cause a Denial of Service DoS by presenting a specially crafted X.509 certificate with a large number of DNS Subject Alternative Name SAN entries. The certificate verification process, specifical...

crypto/x509: golang: Go crypto/x509: Certificate validation bypass due to incorrect DNS constraint application

A flaw was found in the crypto/x509 package within Go golang. When verifying a certificate chain, excluded DNS Domain Name System constraints are not correctly applied to wildcard DNS Subject Alternative Names SANs if the case of the SAN differs from the constraint. This oversight could allow an...

Important: Red Hat Security Advisory: Red Hat OpenShift Service Mesh 3.0.14

Red Hat OpenShift Service Mesh 3.0.14 This update has a security impact of Important. A Common Vulnerability Scoring System CVSS base score, which gives a detailed severity rating, is available for each vulnerability from the CVE links in the References section. Red Hat OpenShift Service Mesh...

crypto/x509: golang: Go crypto/x509: Certificate validation bypass due to incorrect DNS constraint application

A flaw was found in the crypto/x509 package within Go golang. When verifying a certificate chain, excluded DNS Domain Name System constraints are not correctly applied to wildcard DNS Subject Alternative Names SANs if the case of the SAN differs from the constraint. This oversight could allow an...

crypto/x509: golang: golang crypto/x509: Denial of Service via excessive processing of DNS SAN entries

A flaw was found in the crypto/x509 package of golang. This vulnerability allows a remote attacker to cause a Denial of Service DoS by presenting a specially crafted X.509 certificate with a large number of DNS Subject Alternative Name SAN entries. The certificate verification process, specifical...

crypto/x509: golang: Go crypto/x509: Certificate validation bypass due to incorrect DNS constraint application

A flaw was found in the crypto/x509 package within Go golang. When verifying a certificate chain, excluded DNS Domain Name System constraints are not correctly applied to wildcard DNS Subject Alternative Names SANs if the case of the SAN differs from the constraint. This oversight could allow an...

Improper Validation of Certificate with Host Mismatch

Overview Affected versions of this package are vulnerable to Improper Validation of Certificate with Host Mismatch in the HostnameUtil class, whose "match CN when no dNSName SAN exists" fallback is gated on Properties.isOverrideSetJSSEHOSTNAMECHECKCNFALLBACK, true, which returns true when the...