CVE-2026-40093
8.1 · HIGHOverview
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
| Vendor | Product | Versions | Status |
|---|---|---|---|
| nimiq | nimiq_proof-of-stake | >= 0, < 1.3.0 | Affected |
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's AI-powered security agents can automatically detect CVE-2026-40093 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.
How CyberStrike Helps
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