{"id":"CVE-2026-40093","revision":null,"records":[{"revision":"691290f01743415bae60ecb07cbdd70e","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-40093","aliases":[],"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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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.","state":0,"publishedAt":null,"modifiedAt":null,"affected":[],"metrics":[{"system":"EUVD CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H","score":8.1,"severity":null}],"references":["https://github.com/nimiq/core-rs-albatross/security/advisories/GHSA-49xc-52mp-cc9j"],"sourceUrl":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-21146","license":"ENISA EUVD · source terms and attribution apply","enrichment":{"sourceStatus":null,"weaknesses":[],"productCriteria":[],"sourceDates":{"datePublished":"Apr 9, 2026, 8:29:46 PM","dateUpdated":"Apr 13, 2026, 3:38:14 PM"},"relatedAdvisories":[],"note":"EUVD source date text has no stated timezone and is retained without inventing a UTC instant. Related bulletin membership is not an alias, common cause or applicability claim. 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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.","state":0,"publishedAt":"2026-04-09T21:16:11.937+00:00","modifiedAt":"2026-10-26T00:10:00.15+00:00","affected":[],"metrics":[{"system":"CVSS 3.1 · security-advisories@github.com · Secondary","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H","score":8.1,"severity":"HIGH"}],"references":["https://github.com/nimiq/core-rs-albatross/security/advisories/GHSA-49xc-52mp-cc9j"],"sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-40093","license":"NIST NVD usage terms; underlying source attribution retained","enrichment":{"sourceStatus":"Analyzed","weaknesses":["CWE-1284"],"productCriteria":["cpe:2.3:a:nimiq:nimiq_proof-of-stake:*:*:*:*:*:rust:*:*"],"sourceDates":{"published":"2026-04-09T21:16:11.937","lastModified":"2026-10-26T00:10:00.150"},"relatedAdvisories":[],"note":"NVD analysis and CPE criteria are source context, not proof that a package or your environment is affected. Complete affected data, logical configurations and SSVC are retained in the original JSON."},"key":"nvd:CVE-2026-40093","identifiers":["CVE-2026-40093"]},"retained":false,"historicalAffected":[]},{"revision":"d23257f809464afe9dd3ea3d5e8ec1a3","observedAt":"2026-10-24T13:19:54.901+00:00","statement":{"source":"osv","id":"GHSA-49xc-52mp-cc9j","aliases":["CVE-2026-40093"],"title":"nimiq-blockchain is missing a wall-clock upper bound on block timestamps","description":"### Impact\n\nBlock 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.\n\n### Patches\nTBD\n\n### Workarounds\nNo know workarounds.","state":0,"publishedAt":"2026-04-10T19:55:04+00:00","modifiedAt":"2026-04-10T20:11:22.935964+00:00","affected":[{"ecosystem":"crates.io","name":"nimiq-blockchain","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"0"},{"kind":"last_affected","version":"1.3.0"}]}],"versions":[],"rawVersionEvidence":null}],"metrics":[{"system":"CVSS_V3","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H","score":null,"severity":null},{"system":"Publisher rating","vector":null,"score":null,"severity":"CRITICAL"}],"references":["https://github.com/nimiq/core-rs-albatross/security/advisories/GHSA-49xc-52mp-cc9j","https://nvd.nist.gov/vuln/detail/CVE-2026-40093","https://github.com/nimiq/core-rs-albatross"],"sourceUrl":"https://github.com/advisories/GHSA-49xc-52mp-cc9j","license":"GitHub Advisory Database · CC-BY-4.0","key":"osv:GHSA-49xc-52mp-cc9j","identifiers":["GHSA-49xc-52mp-cc9j","CVE-2026-40093"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. 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