CVE-2026-82407High· 7.0▾ MidnightPoC availableKlever-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,…
▾ Midnight zone — Critical, or high with PoC / in-the-wild
impact 38.5 · likelihood 0 · exploitation 12
A public proof-of-concept already exists for this vulnerability — see Exploit availability below.
Stakeholder-Specific Vulnerability Categorization from CISA's ADP record at CVE.org: whether exploitation is observed, whether an attack can be automated, and how much of the system is at stake. The CVSS score shown above comes from the assigning CNA record, not NVD.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via NVD
Exploit / PoC code exists
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.
Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
Field changes observed since this record was first indexed.
Connected by shared product, vendor, weakness, or advisory.
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CVE-2026-82406High· 7.1Klever-Go is the Go implementation of the Klever blockchain protocol
CVE-2026-82409High· 8.4Klever-Go is the Go implementation of the Klever blockchain protocol
CVE-2026-49343Medium· 5.9Klever-Go is the Go implementation of the Klever blockchain protocol
CVE-2026-86065High· 7.5Klever-Go is the Go implementation of the Klever blockchain protocol
CVE-2026-82405High· 8.7Klever-Go is the Go implementation of the Klever blockchain protocol