CVE-2026-47249: Klever-Go KVM: Hash-array amplification in P2P resolver request handling

June 5, 2026

A connected peer can send a compressed RequestDataType_HashArrayType direct request that is only 442 bytes on the wire but expands into 200000 decoded hash entries inside the resolver path. On klever-go v1.7.17, this allows remote memory and CPU amplification against nodes that accept P2P peer connections.

References

github.com/advisories/GHSA-w342-mj6g-v9c4
github.com/klever-io/klever-go/releases/tag/v1.7.18
github.com/klever-io/klever-go/security/advisories/GHSA-w342-mj6g-v9c4
nvd.nist.gov/vuln/detail/CVE-2026-47249

Code Behaviors & Features

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