{"id":"CVE-2026-34066","sourceIdentifier":"security-advisories@github.com","published":"2026-04-22T20:16:41.237","lastModified":"2026-06-17T10:38:30.600","vulnStatus":"Analyzed","cveTags":[],"descriptions":[{"lang":"en","value":"nimiq-blockchain provides persistent block storage for Nimiq's Rust implementation. Prior to version 1.3.0, `HistoryStore::put_historic_txns` uses an `assert!` to enforce invariants about `HistoricTransaction.block_number` (must be within the macro block being pushed and within the same epoch). During history sync, a peer can influence the `history: &[HistoricTransaction]` input passed into `Blockchain::push_history_sync`, and a malformed history list can violate these invariants and trigger a panic. `extend_history_sync` calls `this.history_store.add_to_history(..)` before comparing the computed history root against the macro block header (`block.history_root()`), so the panic can happen before later rejection checks run. The patch for this vulnerability is included as part of v1.3.0. No known workarounds are available."}],"affected":[{"source":"security-advisories@github.com","affectedData":[{"vendor":"nimiq","product":"nimiq-blockchain","versions":[{"version":"< 1.3.0","status":"affected"}]}]}],"metrics":{"cvssMetricV31":[{"source":"security-advisories@github.com","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:H","baseScore":5.3,"baseSeverity":"MEDIUM","attackVector":"NETWORK","attackComplexity":"HIGH","privilegesRequired":"NONE","userInteraction":"REQUIRED","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"HIGH"},"exploitabilityScore":1.6,"impactScore":3.6}],"ssvcV203":[{"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","ssvcData":{"timestamp":"2026-04-23T12:56:55.597573Z","id":"CVE-2026-34066","options":[{"exploitation":"none"},{"automatable":"no"},{"technicalImpact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}]},"weaknesses":[{"source":"security-advisories@github.com","type":"Secondary","description":[{"lang":"en","value":"CWE-20"},{"lang":"en","value":"CWE-617"},{"lang":"en","value":"CWE-754"}]}],"configurations":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:nimiq:nimiq_proof-of-stake:*:*:*:*:*:rust:*:*","versionEndExcluding":"1.3.0","matchCriteriaId":"CD0CAAD1-7626-4A4A-A6F8-9DC46FE50731"}]}]}],"references":[{"url":"https://github.com/nimiq/core-rs-albatross/commit/6f5511309c199d84b012fe6b9aba7e5582892c50","source":"security-advisories@github.com","tags":["Patch"]},{"url":"https://github.com/nimiq/core-rs-albatross/pull/3656","source":"security-advisories@github.com","tags":["Issue Tracking","Patch"]},{"url":"https://github.com/nimiq/core-rs-albatross/releases/tag/v1.3.0","source":"security-advisories@github.com","tags":["Release Notes"]},{"url":"https://github.com/nimiq/core-rs-albatross/security/advisories/GHSA-j99g-7rqw-q9jg","source":"security-advisories@github.com","tags":["Patch","Vendor Advisory"]}]}