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CVE-2026-61699 is a certificate validation flaw in nebula-mesh in which certificate revocation is not enforced across the mesh. Agent-side handling of the per-CA blocklist is not implemented, and generated agent configuration omits the pki.blocklist setting. As a result, certificates associated with blocked, offboarded, or compromised hosts remain trusted by peer nodes until the certificates naturally expire rather than being rejected after revocation. The issue affects the mesh trust model by preventing timely invalidation of previously issued credentials.
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