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Security Advisories

CVE-2026-25793

NVD

https://nvd.nist.gov/vuln/detail/CVE-2026-25793

Severity

Unknown
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Summary

Nebula Has Possible Blocklist Bypass via ECDSA Signature Malleability

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.

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