{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-82407", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-08-28T22:00:43.513Z", "datePublished": "2026-09-23T19:17:59.006Z", "dateUpdated": "2026-09-23T19:42:17.556Z"}, "containers": {"cna": {"title": "Klever-Go: Validator registration accepts an unvalidated BLS public key \u2192 consensus liveness DoS", "problemTypes": [{"descriptions": [{"cweId": "CWE-20", "lang": "en", "description": "CWE-20: Improper Input Validation", "type": "CWE"}]}], "metrics": [{"cvssV4_0": {"attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "PRESENT", "privilegesRequired": "LOW", "userInteraction": "NONE", "vulnConfidentialityImpact": "NONE", "vulnIntegrityImpact": "NONE", "vulnAvailabilityImpact": "HIGH", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "subAvailabilityImpact": "HIGH", "baseScore": 7, "baseSeverity": "HIGH", "vectorString": "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", "version": "4.0"}}], "references": [{"name": "https://github.com/klever-io/klever-go/security/advisories/GHSA-9wh6-9hq7-9688", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/klever-io/klever-go/security/advisories/GHSA-9wh6-9hq7-9688"}, {"name": "https://github.com/klever-io/klever-go/commit/11606a90ccc289f93d0175994733229b332d9cff", "tags": ["x_refsource_MISC"], "url": "https://github.com/klever-io/klever-go/commit/11606a90ccc289f93d0175994733229b332d9cff"}, {"name": "https://github.com/klever-io/klever-go/commit/642da967893884d635986fed3c43bdc679cbfe8f", "tags": ["x_refsource_MISC"], "url": "https://github.com/klever-io/klever-go/commit/642da967893884d635986fed3c43bdc679cbfe8f"}, {"name": "https://github.com/klever-io/klever-go/releases/tag/v1.7.20", "tags": ["x_refsource_MISC"], "url": "https://github.com/klever-io/klever-go/releases/tag/v1.7.20"}], "affected": [{"vendor": "klever-io", "product": "klever-go", "versions": [{"version": "< 1.7.20", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-09-23T19:17:59.006Z"}, "descriptions": [{"lang": "en", "value": "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."}], "source": {"advisory": "GHSA-9wh6-9hq7-9688", "discovery": "UNKNOWN"}}, "adp": [{"references": [{"url": "https://github.com/klever-io/klever-go/security/advisories/GHSA-9wh6-9hq7-9688", "tags": ["exploit"]}], "metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-09-23T19:41:57.322149Z", "id": "CVE-2026-82407", "options": [{"Exploitation": "poc"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-09-23T19:42:17.556Z"}}]}}

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