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: 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: 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...

curl: Trailing-dot IPv4 URL bypasses IP-address guard, allows wildcard DNS SAN match

Hi all, Sorry to ruin anybody's day, but we've discovered another issue when it comes to dots. We've found a TLS certificate verification bypass that lets a trailing-dot IPv4 URL -- https://127.0.0.1./ -- pass peer authentication against a wildcard DNS SAN certificate such as DNS:.0.0.1. The IP...

CLEANSTART-2026-FB07695 When verifying a certificate chain containing excluded DNS constraints, these constraints are not correctly applied to wildcard DNS SANs which use a different case than the constraint

Multiple security vulnerabilities affect the velero-fips package. When verifying a certificate chain containing excluded DNS constraints, these constraints are not correctly applied to wildcard DNS SANs which use a different case than the constraint. See references for individual vulnerability...

SUSE-SU-2026:21126-1 Security update for python-cryptography

This update for python-cryptography fixes the following issues: - CVE-2026-34073: Fixed X.509 bypass of name constraints on wildcard SANs with matching peer names. bsc1260876...

PT-2026-32425

When verifying a certificate chain containing excluded DNS constraints, these constraints are not correctly applied to wildcard DNS SANs which use a different case than the constraint. This only affects validation of otherwise trusted certificate chains, issued by a root CA in the...

golang: crypto/x509: excluded subdomain constraint does not restrict wildcard SANs

A flaw was found in the crypto/x509 package in the Go standard library. This vulnerability allows a certificate validation bypass via an excluded subdomain constraint in a certificated chain as it does not restrict the usage of wildcard SANs in the leaf certificate...

SUSE CVE-2026-33810

When verifying a certificate chain containing excluded DNS constraints, these constraints are not correctly applied to wildcard DNS SANs which use a different case than the constraint. This only affects validation of otherwise trusted certificate chains, issued by a root CA in the...

Security Bulletin: Certificate Name Constraints Bypass via Wildcard SANs affects watsonx.data

Summary Improper enforcement of certificate name constraints allows wildcard SANs e.g., .example.com to bypass excluded subdomain restrictions e.g., test.example.com, potentially enabling unauthorized certificate usage.This can affect watsonx.data. Vulnerability Details CVEID:CVE-2025-61727...

CVE-2026-33810

When verifying a certificate chain containing excluded DNS constraints, these constraints are not correctly applied to wildcard DNS SANs which use a different case than the constraint. This only affects validation of otherwise trusted certificate chains, issued by a root CA in the...

EUVD-2026-20024

When verifying a certificate chain containing excluded DNS constraints, these constraints are not correctly applied to wildcard DNS SANs which use a different case than the constraint. This only affects validation of otherwise trusted certificate chains, issued by a root CA in the...

CVE-2026-33810

When verifying a certificate chain containing excluded DNS constraints, these constraints are not correctly applied to wildcard DNS SANs which use a different case than the constraint. This only affects validation of otherwise trusted certificate chains, issued by a root CA in the...

CLEANSTART-2026-VZ85637 excluded subdomain constraint in a certificate chain does not restrict the usage of wildcard SANs in the leaf certificate

Multiple security vulnerabilities affect the helm-fips package. An excluded subdomain constraint in a certificate chain does not restrict the usage of wildcard SANs in the leaf certificate. See references for individual vulnerability details...

CLEANSTART-2026-UR80185 excluded subdomain constraint in a certificate chain does not restrict the usage of wildcard SANs in the leaf certificate

Multiple security vulnerabilities affect the helm-fips package. An excluded subdomain constraint in a certificate chain does not restrict the usage of wildcard SANs in the leaf certificate. See references for individual vulnerability details...

CLEANSTART-2026-HX78047 excluded subdomain constraint in a certificate chain does not restrict the usage of wildcard SANs in the leaf certificate

Multiple security vulnerabilities affect the helm-fips package. An excluded subdomain constraint in a certificate chain does not restrict the usage of wildcard SANs in the leaf certificate. See references for individual vulnerability details...

CLEANSTART-2026-GS02052 excluded subdomain constraint in a certificate chain does not restrict the usage of wildcard SANs in the leaf certificate

Multiple security vulnerabilities affect the helm-fips package. An excluded subdomain constraint in a certificate chain does not restrict the usage of wildcard SANs in the leaf certificate. See references for individual vulnerability details...

CLEANSTART-2026-BL06950 excluded subdomain constraint in a certificate chain does not restrict the usage of wildcard SANs in the leaf certificate

Multiple security vulnerabilities affect the istio-pilot-discovery-fips package. An excluded subdomain constraint in a certificate chain does not restrict the usage of wildcard SANs in the leaf certificate. See references for individual vulnerability details...

CLEANSTART-2026-VL83369 excluded subdomain constraint in a certificate chain does not restrict the usage of wildcard SANs in the leaf certificate

Multiple security vulnerabilities affect the kube-state-metrics-fips package. An excluded subdomain constraint in a certificate chain does not restrict the usage of wildcard SANs in the leaf certificate. See references for individual vulnerability details...

CLEANSTART-2026-LP38773 excluded subdomain constraint in a certificate chain does not restrict the usage of wildcard SANs in the leaf certificate

Multiple security vulnerabilities affect the kube-state-metrics-fips package. An excluded subdomain constraint in a certificate chain does not restrict the usage of wildcard SANs in the leaf certificate. See references for individual vulnerability details...