CVE-2026-25793HIGH 8.1EPSS p3.1%

CVE-2026-25793CVE-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.

Scoring

CVSS 3.18.1 (HIGH)
VectorCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
EPSS0.13% probability of exploitation · percentile 3.1% · 2026-06-17T12:03:21Z
Published2026-02-06
Last modified2026-02-18

Underlying weaknesses· 1

CWE-347

References

  1. https://github.com/slackhq/nebula/commit/f573e8a26695278f9d71587390fbfe0d0933aa21
  2. https://github.com/slackhq/nebula/security/advisories/GHSA-69x3-g4r3-p962

1

TypeTargetConfidenceTier
WeaknessImproper Verification of Cryptographic Signaturecwe-3470%live

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Sourced from NVD + FIRST.org EPSS. Curated for EU compliance use cases by Adam Lundqvist, Founder at SQUR.