{
    "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 → 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"
                }
            }
        ]
    }
}