{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-52878", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-06-08T21:44:27.364Z", "datePublished": "2026-08-07T22:32:27.340Z", "dateUpdated": "2026-08-07T22:32:27.340Z"}, "containers": {"cna": {"title": "Klever-Go: Unauthenticated nil-pointer DoS in P2P transaction validation can halt the chain", "problemTypes": [{"descriptions": [{"cweId": "CWE-476", "lang": "en", "description": "CWE-476: NULL Pointer Dereference", "type": "CWE"}]}], "metrics": [{"cvssV3_1": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 7.5, "baseSeverity": "HIGH", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}}], "references": [{"name": "https://github.com/klever-io/klever-go/security/advisories/GHSA-rm5c-5x2p-48wr", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/klever-io/klever-go/security/advisories/GHSA-rm5c-5x2p-48wr"}, {"name": "https://github.com/klever-io/klever-go/releases/tag/v1.7.18", "tags": ["x_refsource_MISC"], "url": "https://github.com/klever-io/klever-go/releases/tag/v1.7.18"}], "affected": [{"vendor": "klever-io", "product": "klever-go", "versions": [{"version": ">= 1.7.14, < 1.7.18", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-08-07T22:32:27.340Z"}, "descriptions": [{"lang": "en", "value": "Klever-Go is the Go implementation of the Klever blockchain protocol. Versions 1.7.14 through 1.7.17 are vulnerable to a nil-pointer panic triggered by a protobuf Transaction whose embedded RawData sub-message is omitted. This omission causes RawData to decode to nil. Every transaction gossiped on the Klever-Go P2P network is decoded and validated synchronously inside the libp2p pubsub topic-validator callback, where txVersionChecker.CheckTxVersion dereferences tx.RawData.Version with no nil check. Because the libp2p pubsub callback, the underlying go-libp2p-pubsub validation worker, and Klever's own network/p2p layer install no recover(), the panic propagates and crashes the entire node process. The attacker payload is a 3-byte protobuf message; no validator key, stake, funds, or on-chain account is required, and delivery aimed at enough of the BLS validator set can halt block production, resulting in a chain halt. This issue has been fixed in version 1.7.18."}], "source": {"advisory": "GHSA-rm5c-5x2p-48wr", "discovery": "UNKNOWN"}}}}

{}

{}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[1.7.14,1.7.18)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "klever-go", "source": "cna", "vendor": "klever-io"}, "product": "klever-go", "vendor": "klever-io"}], "created": "2026-08-08T00:00:04.395669+00:00", "updated": "2026-08-08T00:00:04.761910+00:00", "vendors": ["klever-io", "klever-io$PRODUCT$klever-go"]}