Is CVE-2026-40092 actively exploited?

No active exploitation of CVE-2026-40092 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-40092 be exploited remotely?

Yes. CVE-2026-40092 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-40092?

CVE-2026-40092 has a CVSS score of 7.5 (HIGH).

HOME VULNERABILITIESCVE-2026-40092

HIGH

CVE-2026-40092

CWE-252Published: May 20, 2026· Updated: May 21, 2026

7.5

CVSS v3.1

EPSS:0.02%probability of exploitation in 30 daysPercentile:5.9th

Official Description

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.

NVD Source

Technical Analysis

CVE-2026-40092 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in availability disruption (denial of service), with a CVSS base score of 7.5.