CVE-2026-28402

Nimiq · core-rs-albatross

A security vulnerability exists in the Nimiq Proof-of-Stake protocol implementation within the Albatross consensus algorithm, potentially impacting network stability or integrity.

Executive summary

A high-severity vulnerability in the Nimiq core-rs-albatross implementation poses a significant risk to the integrity and reliability of the Albatross consensus mechanism.

Vulnerability

This vulnerability affects the Rust-based implementation of the Nimiq Proof-of-Stake protocol. While specific technical details regarding the exploit vector are limited, the flaw resides within the Albatross consensus algorithm logic, potentially allowing an attacker to disrupt network synchronization or validator operations.

Business impact

A successful exploit of this vulnerability could lead to significant network downtime, loss of consensus, or the potential for double-spending if the Proof-of-Stake mechanism is compromised. With a CVSS score of 7.1, this is classified as a High-severity issue, representing a substantial risk to the financial integrity and availability of the Nimiq blockchain ecosystem.

Remediation

Immediate Action: Administrators and node operators should apply the latest security updates provided by the Nimiq development team immediately to secure the Albatross consensus implementation.

Proactive Monitoring: Monitor node logs for unusual consensus delays, frequent re-organizations, or anomalous peer-to-peer communication patterns that may indicate exploitation attempts.

Compensating Controls: Ensure that nodes are behind well-configured firewalls and limit peer connections to known, trusted participants where possible to reduce the attack surface.

Exploitation status

Public Exploit Available: false

Analyst recommendation

The severity of this flaw necessitates immediate attention from all stakeholders operating Nimiq infrastructure. Failure to patch may lead to a total loss of confidence in the network's consensus state. We strongly recommend applying the official vendor updates immediately to mitigate the risk of protocol-level exploitation.