CVE-2026-40093 — Nimiq Nimiq_proof-of-stake: nimiq-blockchain provides persistent block storage for Nimiq's Rust implementation.
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 Pol CVSSv3.1 8.1 (HIGH) · EPSS 20th percentile