{"id":"CVE-2026-34069","aliases":["EUVD-2026-22160","GHSA-48m6-486p-9j8p"],"status":"published","title":"nimiq-consensus panics via RequestMacroChain micro-block locator","description":"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.","severity":{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-09","score":0.00297,"percentile":0.22481,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-617"],"published":"2026-04-13T16:36:00Z","modified":"2026-10-28T02:30:51Z","affected":[{"source":"ghsa","ecosystem":"crates.io","package":"nimiq-consensus","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"last_affected":"1.2.2"}]}]},{"source":"osv","ecosystem":"crates.io","package":"nimiq-consensus","ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"last_affected":"1.2.2"}]}]}],"products":[{"vendor":"nimiq","product":"core-rs-albatross"},{"vendor":"nimiq","product":"nimiq_proof-of-stake"}],"references":[{"url":"https://github.com/nimiq/core-rs-albatross/security/advisories/GHSA-48m6-486p-9j8p","tags":["x_refsource_CONFIRM","Patch","Vendor Advisory","advisory","web"]},{"url":"https://github.com/nimiq/core-rs-albatross/pull/3660","tags":["x_refsource_MISC","Issue Tracking","Patch","fix","web"]},{"url":"https://github.com/nimiq/core-rs-albatross/commit/ae6c1e92342e72f80fd12accbe66ee80dd6802ac","tags":["x_refsource_MISC","Patch","fix","web"]},{"url":"https://github.com/nimiq/core-rs-albatross/releases/tag/v1.3.0","tags":["x_refsource_MISC","Release Notes","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-34069","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-48m6-486p-9j8p"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/34xxx/CVE-2026-34069.json","tags":["advisory"]},{"url":"https://github.com/nimiq/core-rs-albatross","tags":["package"]}],"sources":{"cve":[{"id":"CVE-2026-34069","title":"nimiq-consensus panics via RequestMacroChain micro-block locator","description":"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.","status":"published","published":"2026-04-13T23:55:52.994Z","modified":"2026-04-14T16:28:14.091Z","cvss":[{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","level":"medium","assessor":"cna"}],"cwes":["CWE-617"],"updated_at":"2026-11-02T14:20:13.962274Z"}],"euvd":[{"id":"EUVD-2026-22160","description":"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.","status":"published","published":"2026-04-13T23:55:52Z","modified":"2026-04-14T16:28:14Z","cvss":[{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","level":"medium"}],"updated_at":"2026-11-02T19:24:25.999353Z"}],"ghsa":[{"id":"GHSA-48m6-486p-9j8p","title":"nimiq-consensus panics via RequestMacroChain micro-block locator","description":"### Impact\n An unauthenticated p2p peer can cause the `RequestMacroChain` message handler task to panic by sending a `RequestMacroChain` message where the first locator hash that is on the victim’s main chain is a micro block hash (not a macro block hash).\n\nIn `RequestMacroChain::handle`, the 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`).\n\n### Patches\nThe patch for this vulnerability](https://github.com/nimiq/core-rs-albatross/pull/3660) is formally released as part of [v1.3.0](https://github.com/nimiq/core-rs-albatross/releases/tag/v1.3.0).\n\n### Workarounds\nNo known workarounds.","status":"published","published":"2026-04-13T16:36:00Z","modified":"2026-04-15T20:56:43Z","cvss":[{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","level":"medium"}],"cwes":["CWE-617"],"updated_at":"2026-11-02T14:39:54.128054Z"}],"nvd":[{"id":"CVE-2026-34069","description":"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.","status":"published","published":"2026-04-14T00:16:07.023Z","modified":"2026-10-26T21:10:00.17Z","cvss":[{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","level":"medium","assessor":"secondary"}],"cwes":["CWE-617"],"updated_at":"2026-11-02T14:12:14.37744Z"}],"osv":[{"id":"CVE-2026-34069","title":"nimiq-consensus panics via RequestMacroChain micro-block locator","description":"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.","status":"published","published":"2026-04-13T23:55:52.994Z","modified":"2026-10-28T02:30:51.054329962Z","cvss":[{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","level":"medium"}],"cwes":["CWE-617"],"updated_at":"2026-11-02T15:45:02.247031Z"},{"id":"GHSA-48m6-486p-9j8p","title":"nimiq-consensus panics via RequestMacroChain micro-block locator","description":"### Impact\n An unauthenticated p2p peer can cause the `RequestMacroChain` message handler task to panic by sending a `RequestMacroChain` message where the first locator hash that is on the victim’s main chain is a micro block hash (not a macro block hash).\n\nIn `RequestMacroChain::handle`, the 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`).\n\n### Patches\nThe patch for this vulnerability](https://github.com/nimiq/core-rs-albatross/pull/3660) is formally released as part of [v1.3.0](https://github.com/nimiq/core-rs-albatross/releases/tag/v1.3.0).\n\n### Workarounds\nNo known workarounds.","status":"published","published":"2026-04-13T16:36:00Z","modified":"2026-04-15T21:04:55.230558Z","cvss":[{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","level":"medium"}],"cwes":["CWE-617"],"updated_at":"2026-11-02T15:46:36.782754Z"}]}}