nimiq-consensus panics via RequestMacroChain micro-block locator
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.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2026-34069
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 7 Nov 2026, 14:59 UTC · Revision 1
Source evidence
nimiq-consensus panics via RequestMacroChain micro-block locator
core-osv · Original sourcePublished 13 Apr 2026, 23:55 UTC
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.
osv:CVE-2026-34069
Complete source record
{
"id": "851299f5f7e67eb876f294c2c0606a1272a8dc26c82ed8ad2bafce2cbeb0f66b",
"url": "https://osv.dev/vulnerability/CVE-2026-34069",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "nimiq-consensus panics via RequestMacroChain micro-block locator",
"summary": "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.",
"evidence": "osv:CVE-2026-34069",
"products": [],
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"aliases": [
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"GHSA-48m6-486p-9j8p"
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"metrics": [
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"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L"
}
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"affected": [
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"source": "CPE_RANGE"
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"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-34069.json"
}
}
],
"modified": "2026-10-28T02:30:51.054329962Z",
"provider": "osv",
"references": [
"https://github.com/nimiq/core-rs-albatross/releases/tag/v1.3.0",
"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/34xxx/CVE-2026-34069.json",
"https://github.com/nimiq/core-rs-albatross/security/advisories/GHSA-48m6-486p-9j8p",
"https://nvd.nist.gov/vuln/detail/CVE-2026-34069",
"https://github.com/nimiq/core-rs-albatross/commit/ae6c1e92342e72f80fd12accbe66ee80dd6802ac",
"https://github.com/nimiq/core-rs-albatross/pull/3660"
],
"provider_metadata": {
"cwe_ids": [
"CWE-617"
],
"cna_assigner": "GitHub_M",
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/34xxx/CVE-2026-34069.json"
}
},
"related_cves": [
{
"value": "CVE-2026-34069",
"evidence": "/id"
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"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 519703,
"published_at": "2026-04-13T23:55:52.994+00:00"
}