Vulnerability Description
Klever-Go is the Go implementation of the Klever blockchain protocol. Prior to 1.7.20, core/kapp/validators/validators.go Register and the runtime validator update path accept a submitted BLSPublicKey without curve, prime-order subgroup, or nonzero validation. When a validator with a malformed key becomes eligible and is selected into a consensus group, MultiSigner.Reset and the corresponding signature verification creation path cannot deserialize the group key and cancel the slot. This causes repeated missed rounds and throughput degradation, and a network whose consensus group equals the eligible validator set can halt completely. Genesis validation is not affected because that path already performs CheckPublicKeyValid. This issue is fixed in version 1.7.20.
Related Weaknesses (CWE)
References
- https://github.com/klever-io/klever-go/commit/11606a90ccc289f93d0175994733229b33
- https://github.com/klever-io/klever-go/commit/642da967893884d635986fed3c43bdc679
- https://github.com/klever-io/klever-go/releases/tag/v1.7.20
- https://github.com/klever-io/klever-go/security/advisories/GHSA-9wh6-9hq7-9688
- https://github.com/klever-io/klever-go/security/advisories/GHSA-9wh6-9hq7-9688
FAQ
What is CVE-2026-82407?
CVE-2026-82407 is a documented vulnerability. Klever-Go is the Go implementation of the Klever blockchain protocol. Prior to 1.7.20, core/kapp/validators/validators.go Register and the runtime validator update path accept a submitted BLSPublicKey...
How severe is CVE-2026-82407?
CVSS scoring is not yet available for CVE-2026-82407. Check NVD for updates.
Is there a patch for CVE-2026-82407?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.