CVE-2026-25793
Nebula Has Possible Blocklist Bypass via ECDSA Signature Malleability
Summary
Nebula Has Possible Blocklist Bypass via ECDSA Signature Malleability
Original description
The description as published by the source.
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.
Source: OSV.dev (Open Source Vulnerabilities) NVD GitHub Advisory OSV
Affected packages
Go
github.com/slackhq/nebula
[{"type":"SEMVER","events":[{"introduced":"1.7.0"},{"fixed":"1.10.3"}]}]
References
- advisory github.com
- advisory nvd.nist.gov
- advisory github.com
- package github.com
- patch github.com