CVE-2026-40092: high-severity vulnerability in nimiq core-rs-albatross
nimiq-keys: Unchecked Ed25519 signature length in TaggedPublicKey::verify causes remote node panic via DHT
Published · Updated
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21Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 7.5epss 0.6%
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.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Affected products
nimiq · core-rs-albatrossRelated CVEs — nimiq core-rs-albatross
In the same product, most dangerous first.
CVE-2025-47270HIGHnimiq-network-libp2p Uncontrolled Resource Consumption vulnerabilityEPSS 0.7%CVE-2026-46369HIGHNimiq: Validity store off by one errorEPSS 0.5%CVE-2026-35468MEDIUMnimiq/core-rs-albatross: Panic in history index request handlers when a full node runs without the history indexEPSS 0.5%CVE-2026-33184HIGHnimiq/core-rs-albatross: Discovery handshake limit could underflow and later provoke a deterministic overflow panicEPSS 0.5%CVE-2026-32605HIGHNimiq: Remote crash via off-by-one signer bounds check in proposal bufferEPSS 0.5%CVE-2026-54541LOWNimiq: Panic in TrieProof::verify via child_index unwrap on equal-length keysEPSS 0.4%