{"api_version":"1","generated_at":"2026-04-10T03:21:43+00:00","cve":"CVE-2026-40093","urls":{"html":"https://cve.report/CVE-2026-40093","api":"https://cve.report/api/cve/CVE-2026-40093.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-40093","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-40093"},"summary":{"title":"nimiq-blockchain is missing a wall-clock upper bound on block timestamps","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. 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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.","Type":"Description","Title":"nimiq-blockchain is missing a wall-clock upper bound on block ti"}]}}}