CVE-2026-55996

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,...

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...

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...

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...

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...

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...

DEBIAN-CVE-2026-59638

In Bouncy Castle for Java before 1.85, JSSE hostname verifier CN-fallback enabled by default despite documented opt-in. This issue also affects Bouncy Castle for Java LTS before 2.73.12, and Bouncy Castle for Java FIPS BC-FJA before bctls-fips 1.0.24 1.0.X series, 2.0.24 2.0.X series and 2.1.24...

Linux Distros Unpatched Vulnerability : CVE-2026-66402

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - FreeRDP before 3.29.0 affected versions = 3.28.0 contains multiple TLS certificate identity validation weaknesses in tlsverifycertificate, tlsmatchhostname, and...

CVE-2026-66402

FreeRDP before 3.29.0 affected versions = 3.28.0 contains multiple TLS certificate identity validation weaknesses in tlsverifycertificate, tlsmatchhostname, and x509utilsgetdnsnames. Because FreeRDP performs custom Common Name and DNS SAN string matching instead of using OpenSSL's length-aware...

UBUNTU-CVE-2026-66402

FreeRDP before 3.29.0 affected versions = 3.28.0 contains multiple TLS certificate identity validation weaknesses in tlsverifycertificate, tlsmatchhostname, and x509utilsgetdnsnames. Because FreeRDP performs custom Common Name and DNS SAN string matching instead of using OpenSSL's length-aware...

CVE-2026-66402

FreeRDP before 3.29.0 affected versions = 3.28.0 contains multiple TLS certificate identity validation weaknesses in tlsverifycertificate, tlsmatchhostname, and x509utilsgetdnsnames. Because FreeRDP performs custom Common Name and DNS SAN string matching instead of using OpenSSL's length-aware...

EUVD-2026-51851

FreeRDP before 3.29.0 affected versions = 3.28.0 contains multiple TLS certificate identity validation weaknesses in tlsverifycertificate, tlsmatchhostname, and x509utilsgetdnsnames. Because FreeRDP performs custom Common Name and DNS SAN string matching instead of using OpenSSL's length-aware...

CVE-2026-66402 FreeRDP before 3.29.0 TLS Certificate Identity Validation Bypass

FreeRDP before 3.29.0 affected versions = 3.28.0 contains multiple TLS certificate identity validation weaknesses in tlsverifycertificate, tlsmatchhostname, and x509utilsgetdnsnames. Because FreeRDP performs custom Common Name and DNS SAN string matching instead of using OpenSSL's length-aware...

CVE-2026-66402

CVE-2026-66402 affects FreeRDP up to and including 3.28.x, fixed in 3.29.0. The issue arises from TLS identity validation weaknesses in tls_verify_certificate(), tls_match_hostname(), and x509_utils_get_dns_names(). FreeRDP uses custom Common Name and DNS SAN matching instead of OpenSSL’s length-...

OESA-2026-3118 gnutls security update

GnuTLS is a secure communications library implementing the SSL, TLS and DTLS protocols and technologies around them. It provides a simple C language application programming interface API to access the secure communications protocols as well as APIs to parse and write X.509, PKCS 12, and other...

gnutls: gnutls: Certificate validation bypass due to oversized Subject Alternative Name

A flaw was found in gnutls. When validating certificates, an oversized Subject Alternative Name SAN could cause the validation process to incorrectly fall back to checking the Common Name CN field. This could allow a remote attacker to bypass proper certificate validation, potentially leading to...

gnutls: gnutls: Certificate validation bypass due to improper handling of URI and SRV SANs

A flaw was found in gnutls. A remote attacker could exploit this vulnerability by presenting a specially crafted certificate that contains Uniform Resource Identifier URI or Service SRV Subject Alternative Names SANs. This could cause the certificate validation process to incorrectly fall back to...

gnutls: gnutls: Certificate validation bypass due to oversized Subject Alternative Name

A flaw was found in gnutls. When validating certificates, an oversized Subject Alternative Name SAN could cause the validation process to incorrectly fall back to checking the Common Name CN field. This could allow a remote attacker to bypass proper certificate validation, potentially leading to...

SUSE CVE-2025-6013

Vault and Vault Enterprise's “Vault” ldap auth method may not have correctly enforced MFA if usernameasalias was set to true and a user had multiple CNs that are equal but with leading or trailing spaces. Fixed in Vault Community Edition 1.20.2 and Vault Enterprise 1.20.2, 1.19.8, 1.18.13, and...

JLSEC-2026-755 X.509 name constraint bypass via the Subject Common Name when treated as a DNS-type name

X.509 name constraint bypass via the Subject Common Name when treated as a DNS-type name. A certificate whose Subject CN violates an issuing CA's DNS name constraints could be accepted...