nebula-mesh: Host revocation is not durable - blocked/offboarded hosts can regain a valid certificate

Summary Two related authorization gaps let a host that should no longer be trusted obtain a fresh, valid Nebula certificate, because nebula-mgmt does not re-evaluate revocation/authorization state at certificate issuance time — only at poll time. 1. Blocklist not enforced at sign / re-enroll time...

📄 Cosign 3.0.4 Certificate Chain Validation Bypass

A logic flaw in the certificate verification process of Cosign versions 3.0.4 and below allows signatures to be accepted even when the issuing Intermediate Certificate Authority CA has already expired. This proof of concept generates a chain that can be tested with this software in order to prove...