CVE-2026-25793

HIGH
2026-02-06 [email protected] GHSA-69x3-g4r3-p962
8.1
CVSS 3.1
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CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
None

Lifecycle Timeline

3
Analysis Generated
Mar 12, 2026 - 21:54 vuln.today
Patch Released
Feb 18, 2026 - 17:47 nvd
Patch available
CVE Published
Feb 06, 2026 - 23:15 nvd
HIGH 8.1

Tags

Information Disclosure Nebula Redhat Suse

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.

Analysis

Nebula is a scalable overlay networking tool. [CVSS 8.1 HIGH]

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Remediation

Within 24 hours: Inventory all systems running Nebula and assess criticality of affected infrastructure. Within 7 days: Test the available patch in a non-production environment and develop a deployment plan. …

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Priority Score

41
Low Medium High Critical
KEV: 0
EPSS: +0.0
CVSS: +40
POC: 0

Vendor Status

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CVE-2026-25793 vulnerability details – vuln.today
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