CVE-2026-56821

CVE-2026-56821 (Netty) affects Netty’s OcspServerCertificateValidator. Prior to 4.1.136.Final and 4.2.16.Final, it flags an out-of-date OCSP response but does not stop processing, causing an expired GOOD response to be treated as VALID. This can allow an on-path attacker to replay a stale GOOD OC...