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...

Linux Distros Unpatched Vulnerability : CVE-2026-6731

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - 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...

Security update for go1.26

This update for go1.26 fixes the following issues: Update to go1.26.1 bsc1255111: CVE-2026-25679: net/url: reject IPv6 literal not at start of host bsc1259264. CVE-2026-27137: crypto/x509: incorrect enforcement of email constraints bsc1259266. CVE-2026-27138: crypto/x509: panic in name constraint...

PT-2022-5306

Name of the Vulnerable Software and Affected Versions OpenSSL versions 3.0.0 through 3.0.6 Description A buffer overrun can be triggered in X.509 certificate verification, specifically in name constraint checking. This occurs after certificate chain signature verification and requires either a CA...