CVE-2026-25793 — Nebula Has Possible Blocklist Bypass via ECDSA Signature Malleability
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 …
Published: 2026-02-06 · CVSS: 7.6 · CVSS 4.0
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 the certificate with a different fingerprint. This issue has been patched in version 1.10.3.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7