CVE-2026-42769 Trust-Anchor Substitution via cert/issuer Typo in CMP rootCaKeyUpdate

Issue Summary: An error in the callback used to verify the certificate provided in a Root CA key update Certificate Management Protocol CMP message response rendered the certificate validation ineffectual, which could lead to escalation of credentials from the Registration Authority RA level to t...

CVE-2026-42769

Summary: CVE-2026-42769 arises from an error in the CMP Root CA key rollover verification in OpenSSL. A typo in the certificate chain building code caused the verifier to add the wrong certificate ("newWithOld" instead of the intended "oldRoot") to the chain, rendering the verification ineffectiv...