🛡️ CVE-2026-25793
🟠 CVSS 8.1 — High ✅ No Known Exploit CWE-347 NVD
8.1
CVSS Score
0 Low4 Medium7 High9 Critical10

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.

Details

Severity HIGH
CVSS Score 8.1
CVSS Vector CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
CWE CWE-347
Public Exploit ✅ No
Source NVD
Published 2026-02-06
Updated 2026-06-15
Modified 2026-02-21

Affected Packages

Software From version Fixed in
github.com/slackhq/nebula
nebula 1.7.0 1.10.3

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