Vulnerability in Nimiq Core-Rs-Albatross
CVE-2026-40093
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.
EPSS: 0.003 (24.1th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 8.1 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H.
Affected products
- Nimiq Core-rs-albatross — versions <= 1.3.0
- Nimiq Nimiq_proof-of-stake
Weakness classification (CWE)
References
- security-advisories@github.com (x_refsource_CONFIRM, Broken Link)
Frequently asked questions
- What is CVE-2026-40093?
- CVE-2026-40093 is a high-severity vulnerability in Nimiq Core-Rs-Albatross, classified under Improper Validation of Specified Quantity in Input. CVSS score: 8.1/10. Published 2026-04-09.
- How severe is CVE-2026-40093?
- High severity. CVSS v3 base score is 8.1 out of 10.