{"id":"CVE-2026-34069","sourceIdentifier":"security-advisories@github.com","published":"2026-04-14T00:16:07.023","lastModified":"2026-06-17T10:38:30.920","vulnStatus":"Analyzed","cveTags":[],"descriptions":[{"lang":"en","value":"nimiq/core-rs-albatross is a Rust implementation of the Nimiq Proof-of-Stake protocol based on the Albatross consensus algorithm. In versions 1.2.2 and below, an unauthenticated p2p peer can cause the RequestMacroChain message handler task to panic. Sending a RequestMacroChain message where the first locator hash on the victim’s main chain is a micro block hash (not a macro block hash) causes said panic. The RequestMacroChain::handle handler selects the locator based only on \"is on main chain\", then calls get_macro_blocks() and panics via .unwrap() when the selected hash is not a macro block (BlockchainError::BlockIsNotMacro). This issue has been fixed in version 1.3.0."}],"affected":[{"source":"security-advisories@github.com","affectedData":[{"vendor":"nimiq","product":"core-rs-albatross","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:L/PR:N/UI:N/S:U/C:N/I:N/A:L","baseScore":5.3,"baseSeverity":"MEDIUM","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"LOW"},"exploitabilityScore":3.9,"impactScore":1.4}],"ssvcV203":[{"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","ssvcData":{"timestamp":"2026-04-14T15:35:06.474382Z","id":"CVE-2026-34069","options":[{"exploitation":"none"},{"automatable":"yes"},{"technicalImpact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}]},"weaknesses":[{"source":"security-advisories@github.com","type":"Secondary","description":[{"lang":"en","value":"CWE-617"}]}],"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/ae6c1e92342e72f80fd12accbe66ee80dd6802ac","source":"security-advisories@github.com","tags":["Patch"]},{"url":"https://github.com/nimiq/core-rs-albatross/pull/3660","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-48m6-486p-9j8p","source":"security-advisories@github.com","tags":["Patch","Vendor Advisory"]}]}