Tag
X.509
Safeguard articles tagged "X.509" — guides, analysis, and best practices for software supply chain and application security.
2 articles
Vulnerability Analysis
OpenVPN CVE-2026-84790: How a NUL Byte in a Certificate Name Turns 'admin\0impersonator' Into 'admin'
OpenVPN 2.7.8 fixes CVE-2026-84790, a bug where a certificate whose common name contains a hidden NUL byte, such as admin\0impersonator, is treated as belonging to admin. A peer holding such a certificate could pass a --verify-x509-name admin check, and on a server it would be handed admin's per-client configuration.
Oct 18, 20269 min read
Vulnerability Analysis
OpenSSL CVE-2022-3602: The Critical That Wasn't (But Still Matters)
OpenSSL pre-announced a critical vulnerability that was later downgraded to high severity. The incident revealed as much about our processes as the bug itself.
Jan 17, 20266 min read
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