CVE-2026-25793

Description

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.

PUBLISHED Reserved 2026-02-05 | Published 2026-02-06 | Updated 2026-02-09 | Assigner GitHub_M

Problem types

CWE-347: Improper Verification of Cryptographic Signature

Product status

References

github.com/...nebula/security/advisories/GHSA-69x3-g4r3-p962

github.com/...ommit/f573e8a26695278f9d71587390fbfe0d0933aa21

cve.org (CVE-2026-25793)

nvd.nist.gov (CVE-2026-25793)

Download JSON