{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-40092","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","state":"PUBLISHED","assignerShortName":"GitHub_M","dateReserved":"2026-04-09T00:39:12.206Z","datePublished":"2026-05-20T21:16:40.805Z","dateUpdated":"2026-05-21T12:23:18.024Z"},"containers":{"cna":{"title":"nimiq-keys: Unchecked Ed25519 signature length in TaggedPublicKey::verify causes remote node panic via DHT","problemTypes":[{"descriptions":[{"cweId":"CWE-252","lang":"en","description":"CWE-252: Unchecked Return Value","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/nimiq/core-rs-albatross/security/advisories/GHSA-27w2-87xv-37c6","tags":["x_refsource_CONFIRM"],"url":"https://github.com/nimiq/core-rs-albatross/security/advisories/GHSA-27w2-87xv-37c6"},{"name":"https://github.com/nimiq/core-rs-albatross/pull/3708","tags":["x_refsource_MISC"],"url":"https://github.com/nimiq/core-rs-albatross/pull/3708"},{"name":"https://github.com/nimiq/core-rs-albatross/commit/807ee8e99a7ccdc604d49971f292854bfa36754d","tags":["x_refsource_MISC"],"url":"https://github.com/nimiq/core-rs-albatross/commit/807ee8e99a7ccdc604d49971f292854bfa36754d"},{"name":"https://github.com/nimiq/core-rs-albatross/releases/tag/v1.4.0","tags":["x_refsource_MISC"],"url":"https://github.com/nimiq/core-rs-albatross/releases/tag/v1.4.0"}],"affected":[{"vendor":"nimiq","product":"core-rs-albatross","versions":[{"version":"< 1.4.0","status":"affected"}]}],"providerMetadata":{"orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","shortName":"GitHub_M","dateUpdated":"2026-05-20T21:16:40.805Z"},"descriptions":[{"lang":"en","value":"nimiq-blockchain provides persistent block storage for Nimiq's Rust implementation. In versions 1.3.0 and below, a malicious network peer can crash any Nimiq full node by publishing a crafted Kademlia DHT record. The maliciously crafted record would contain a TaggedSigned<ValidatorRecord, KeyPair> with a signature field whose byte length is not exactly 64 in order to cause a crash. When the victim node's DHT verifier calls TaggedSigned::verify, execution reaches Ed25519Signature::from_bytes(sig).unwrap() in the TaggedPublicKey implementation for Ed25519PublicKey. The from_bytes call fails because ed25519_zebra::Signature::try_from rejects slices not 64 bytes, and the unwrap() panics. The BLS TaggedPublicKey implementation correctly returns false on error; only the Ed25519 implementation panics. This issue has been fixed in version 1.4.0."}],"source":{"advisory":"GHSA-27w2-87xv-37c6","discovery":"UNKNOWN"}},"adp":[{"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-05-21T12:23:05.311120Z","id":"CVE-2026-40092","options":[{"Exploitation":"none"},{"Automatable":"yes"},{"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":"2026-05-21T12:23:18.024Z"}}]}}