CVE-2026-25793

HighCVSS 8.1/10Last modified Jun 17, 2026

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.

Metrics

CVSS 3.1 8.1/10CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N

Weakness enumeration

CWE-347

Affected software

No affected versions have been published.

Timeline

Published: Feb 6, 2026
Last modified: Jun 17, 2026
NVD status: Analyzed

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