{"id":"CVE-2026-82407","revision":"5d7b4619839f46ffbce1144cec3edc42","records":[{"revision":"5d7b4619839f46ffbce1144cec3edc42","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-82407","aliases":[],"title":"Klever-Go: Validator registration accepts an unvalidated BLS public key → consensus liveness DoS","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.","state":0,"publishedAt":"2026-09-23T19:17:59.006+00:00","modifiedAt":"2026-09-23T19:42:17.556+00:00","affected":[{"ecosystem":"Vendor product","name":"klever-go","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"klever-io\",\n                    \"product\": \"klever-go\",\n                    \"versions\": [\n                        {\n                            \"version\": \"< 1.7.20\",\n                            \"status\": \"affected\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:H","score":7,"severity":"HIGH"}],"references":["https://github.com/klever-io/klever-go/security/advisories/GHSA-9wh6-9hq7-9688","https://github.com/klever-io/klever-go/commit/11606a90ccc289f93d0175994733229b332d9cff","https://github.com/klever-io/klever-go/commit/642da967893884d635986fed3c43bdc679cbfe8f","https://github.com/klever-io/klever-go/releases/tag/v1.7.20"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-82407","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-82407","identifiers":["CVE-2026-82407"]},"retained":false,"historicalAffected":[]}],"coverage":[]}