CVE-2026-25793

Nebula is a scalable overlay networking tool. In versions from 1.7.0 to 1.10.2, when using P256 certificates which is not the default configuration, it is possible to evade a blocklist entry created against the fingerprint of a certificate by using ECDSA Signature Malleability to use a copy of th...

GHSA-69X3-G4R3-P962 Blocklist Bypass possible via ECDSA Signature Malleability

Impact When using P256 certificates which is not the default configuration, it is possible to evade a blocklist entry created against the fingerprint of a certificate by using ECDSA Signature Malleability to use a copy of the certificate with a different fingerprint. In order for this to affect a...

CVE-2026-25793: Improper Verification of Cryptographic Signature

Nebula is a scalable overlay networking tool. In versions from 1.7.0 to 1.10.2, when using P256 certificates which is not the default configuration, it is possible to evade a blocklist entry created against the fingerprint of a certificate by using ECDSA Signature Malleability to use a copy of th...

PT-2026-6835

Name of the Vulnerable Software and Affected Versions Nebula versions 1.7.0 through 1.10.2 Description Nebula is a scalable overlay networking tool. When using P256 certificates which is not the default configuration, it is possible to evade a blocklist entry created against the fingerprint of a...