Denial of Service Vulnerability in Nimiq's Blockchain Node by Malicious Kademlia DHT Record
CVE-2026-40092

7.5HIGH

Key Information:

Vendor

Nimiq

Status
Core-rs-albatross
Vendor
CVE Published:
20 May 2026

What is CVE-2026-40092?

A Denial of Service vulnerability exists in the Nimiq blockchain's Rust implementation where a malicious network peer can crash a full node. This occurs when an attacker publishes a specially crafted Kademlia DHT record containing an incorrectly sized signature field. The Nimiq full node's DHT verifier triggers a panic when attempting to validate the signature, leading to a node crash. This vulnerability affects versions 1.3.0 and earlier, and it has been resolved in version 1.4.0.

Affected Version(s)

core-rs-albatross < 1.4.0

References

https://github.com/nimiq/core-rs-albatross/security/advis...
x_refsource_CONFIRM
https://github.com/nimiq/core-rs-albatross/pull/3708
x_refsource_MISC
https://github.com/nimiq/core-rs-albatross/commit/807ee8e...
x_refsource_MISC

CVSS V3.1

Score:
7.5
Severity:
HIGH
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.