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CVE-2026-40093

8.1 · HIGH

nimiq-blockchain provides persistent block storage for Nimiq's Rust implementation.

Published Apr 9, 2026nimiqCWE-1284EPSS 0.31%

Overview

CVE-2026-40093 is a high-severity vulnerability affecting nimiq nimiq_proof-of-stake. It was published on April 9, 2026 and has a CVSS 3.1 base score of 8.1 (HIGH).

This vulnerability has a CVSS 3.1 base score of 8.1, rated HIGH. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

Technical description

nimiq-blockchain provides persistent block storage for Nimiq's Rust implementation. In 1.3.0 and earlier, block timestamp validation enforces that timestamp >= parent.timestamp for non-skip blocks and timestamp == parent.timestamp + MIN_PRODUCER_TIMEOUT for skip blocks, but there is no visible upper bound check against the wall clock. A malicious block-producing validator can set block timestamps arbitrarily far in the future. This directly affects reward calculations via Policy::supply_at() and batch_delay() in blockchain/src/reward.rs, inflating the monetary supply beyond the intended emission schedule.

Remediation

Check the references section for vendor advisories and patches from nimiq. Update nimiq_proof-of-stake to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

Affected products

VendorProductVersionsStatus
nimiqnimiq_proof-of-stake>= 0, < 1.3.0Affected

References

GitHubgithub.com/nimiq/core-rs-albatross/security/advisories/GHSA-49xc-52mp-cc9j

How CyberStrike helps

Frequently asked questions

What is CVE-2026-40093?

CVE-2026-40093 is a high-severity vulnerability affecting nimiq nimiq_proof-of-stake. It was published on April 9, 2026 and has a CVSS 3.1 base score of 8.1 (HIGH).

How severe is CVE-2026-40093?

This vulnerability has a CVSS 3.1 base score of 8.1, rated HIGH. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2026-40093?

Check the references section for vendor advisories and patches from nimiq. Update nimiq_proof-of-stake to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-40093?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-40093 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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