CVE-2026-34067

// Conceptual PoC for CVE-2026-34067 // Demonstrates crafting a payload to trigger the panic in vulnerable versions. // Mocking the struct for demonstration purposes struct HistoryTreeProof; impl HistoryTreeProof { // Vulnerable function logic pub fn verify(history: Vec<u8>, positions: Vec<u8>) -> bool { // This assertion causes the panic assert_eq!(history.len(), positions.len()); true } } fn main() { // Attacker controls these inputs via P2P network let malicious_history = vec![1, 2, 3]; // Length 3 let mismatched_positions = vec![1]; // Length 1 // Triggering the vulnerability // In a real scenario, this is called when processing a network message HistoryTreeProof::verify(malicious_history, mismatched_positions); }

{"cve": {"id": "CVE-2026-34067", "sourceIdentifier": "[email protected]", "published": "2026-04-22T21:17:07.760", "lastModified": "2026-04-24T17:12:48.173", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "nimiq-transaction provides the transaction primitive to be used in Nimiq's Rust implementation. Prior to version 1.3.0, `HistoryTreeProof::verify` panics on a malformed proof where `history.len() != positions.len()` due to `assert_eq!(history.len(), positions.len())`. The proof object is derived from untrusted p2p responses (`ResponseTransactionsProof.proof`) and is therefore attacker-controlled at the network boundary until validated. A malicious peer could trigger a crash by returning a crafted inclusion proof with a length mismatch. The patch for this vulnerability is included as part of v1.3.0. No known workarounds are available."}], "metrics": {"cvssMetricV31": [{"source": "[email protected]", "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:L", "baseScore": 3.1, "baseSeverity": "LOW", "attackVector": "NETWORK", "attackComplexity": "HIGH", "privilegesRequired": "NONE", "userInteraction": "REQUIRED", "scope": "UNCHANGED", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "availabilityImpact": "LOW"}, "exploitabilityScore": 1.6, "impactScore": 1.4}, {"source": "[email protected]", "type": "Primary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H", "baseScore": 6.5, "baseSeverity": "MEDIUM", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "REQUIRED", "scope": "UNCHANGED", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "availabilityImpact": "HIGH"}, "exploitabilityScore": 2.8, "impactScore": 3.6}]}, "weaknesses": [{"source": "[email protected]", "type": "Primary", "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/6ff0800e8e031363e787c827d8d033e5694e4e6a", "source": "[email protected]", "tags": ["Patch"]}, {"url": "https://github.com/nimiq/core-rs-albatross/pull/3659", "source": "[email protected]", "tags": ["Issue Tracking", "Patch"]}, {"url": "https://github.com/nimiq/core-rs-albatross/releases/tag/v1.3.0", "source": "[email protected]", "tags": ["Release Notes"]}, {"url": "https://github.com/nimiq/core-rs-albatross/security/advisories/GHSA-264v-m8fm-76jm", "source": "[email protected]", "tags": ["Patch", "Vendor Advisory"]}]}}