{"items":[{"id":"NVI-00018508","kind":"vulnerability","title":"nimiq-keys: Unchecked Ed25519 signature length in TaggedPublicKey::verify causes remote node panic via DHT","revision":1,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-27w2-87xv-37c6","CVE-2026-40092"],"plain_summary":"GitHub lists this reviewed advisory for nimiq-keys. Published version ranges and source prerequisites are shown below; this is not an inspection of a visitor’s application.","review_status":"source_listed","control_topics":[],"public_actions":[{"summary":"Identify the exact component and deployed version, examine the linked publisher’s conditions, and retain evidence of any mitigation.","source_ids":["sr-3349d9b395ea436e985a6f18920181f7"],"action_type":"investigate","limitations":"Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system.","current_supported_target":null}],"schema_version":"1.1.0","source_metrics":[{"kind":"CVSS","as_of":"2026-06-08T20:14:56.000Z","value":"7.5 high","meaning":"GitHub source severity; exploitability and local consequence require separate evidence.","source_id":"sr-3349d9b395ea436e985a6f18920181f7"}],"why_it_matters":"Published affected context helps an owner decide what evidence to gather. This report has not examined your application.","related_sources":[{"id":"sr-3349d9b395ea436e985a6f18920181f7","url":"https://github.com/advisories/GHSA-27w2-87xv-37c6","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-27w2-87xv-37c6","publisher":"GitHub Advisory Database","observed_at":"2026-11-07T00:51:53.608Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-3349d9b395ea436e985a6f18920181f7"],"technology":"nimiq-keys","known_exclusions":[],"conditions_summary":"### Impact\nA malicious network peer can crash any Nimiq full node by publishing a crafted Kademlia DHT record containing a `TaggedSigned` with a signature field whose byte length is not exactly 64. 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.\n\n### Patches\nThe patch for this vulnerability is formally released as part of v1.4.0.\n\n### Workarounds\nNo known workarounds.\n\n### Resources\nSee PR.","public_affected_ranges":["<= 0.2.0"]}],"null_published_at":"2026-11-07T07:07:39.845Z","source_updated_at":"2026-06-08T20:14:56.000Z","source_disclosed_at":"2026-05-15T16:31:22.000Z","is_synthetic_fixture":false,"null_last_reviewed_at":null,"public_change_summary":"First indexed by Null; source disclosure date is shown separately.","null_first_observed_at":"2026-11-07T00:51:53.608Z"}],"next_cursor":null,"snapshot_revision":"42594"}