{"id":"CVE-2026-82407","revision":"5f7ea3b0f4fd40c9a9defc7271d6e5d2","records":[{"revision":"5f7ea3b0f4fd40c9a9defc7271d6e5d2","observedAt":"2026-10-25T16:19:10.271+00:00","statement":{"source":"nvd","id":"CVE-2026-82407","aliases":[],"title":"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…","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":"2026-09-23T20:17:16.707+00:00","modifiedAt":"2026-09-23T20:17:16.847+00:00","affected":[],"metrics":[{"system":"CVSS 4.0 · security-advisories@github.com · Secondary","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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","score":7,"severity":"HIGH"}],"references":["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","https://github.com/klever-io/klever-go/security/advisories/GHSA-9wh6-9hq7-9688"],"sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-82407","license":"NIST NVD usage terms; underlying source attribution retained","enrichment":{"sourceStatus":"Deferred","weaknesses":["CWE-20"],"productCriteria":[],"sourceDates":{"published":"2026-09-23T20:17:16.707","lastModified":"2026-09-23T20:17:16.847"},"relatedAdvisories":[],"note":"NVD analysis and CPE criteria are source context, not proof that a package or your environment is affected. Complete affected data, logical configurations and SSVC are retained in the original JSON."},"key":"nvd:CVE-2026-82407","identifiers":["CVE-2026-82407"]},"retained":false,"historicalAffected":[]}],"coverage":[]}