CVE-2026-28402

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{"affected": [{"affectedData": [{"product": "core-rs-albatross", "vendor": "nimiq", "versions": [{"status": "affected", "version": "< 1.2.2"}]}], "source": "security-advisories@github.com"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:nimiq:nimiq_proof-of-stake:*:*:*:*:*:rust:*:*", "matchCriteriaId": "9BCFC726-4536-43C8-ABF8-42AFF032FB78", "versionEndExcluding": "1.2.2", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "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. Prior to version 1.2.2, a malicious or compromised validator that is elected as proposer can publish a macro block proposal where `header.body_root` does not match the actual macro body hash. The proposal can pass proposal verification because the macro proposal verification path validates the header but does not validate the binding `body_root == hash(body)`; later code expects this binding and may panic on mismatch, crashing validators. Note that the impact is only for validator nodes. The patch for this vulnerability is formally released as part of v1.2.2. The patch adds the corresponding body root verification in the proposal checks. No known workarounds are available."}, {"lang": "es", "value": "nimiq/core-rs-albatross es una implementaci\u00f3n en Rust del protocolo Nimiq Proof-of-Stake basado en el algoritmo de consenso Albatross. Antes de la versi\u00f3n 1.2.2, un validador malicioso o comprometido que es elegido como proponente puede publicar una propuesta de macrobloque donde `header.body_root` no coincide con el hash real del cuerpo del macrobloque. La propuesta puede pasar la verificaci\u00f3n de la propuesta porque la ruta de verificaci\u00f3n de la macropropuesta valida el encabezado pero no valida la vinculaci\u00f3n `body_root == hash(body)`; el c\u00f3digo posterior espera esta vinculaci\u00f3n y puede entrar en p\u00e1nico en caso de falta de coincidencia, provocando la ca\u00edda de los validadores. Tenga en cuenta que el impacto es solo para los nodos validadores. El parche para esta vulnerabilidad se lanza formalmente como parte de la v1.2.2. El parche a\u00f1ade la verificaci\u00f3n correspondiente del body root en las comprobaciones de la propuesta. No se conocen soluciones alternativas disponibles."}], "id": "CVE-2026-28402", "lastModified": "2026-06-17T10:28:33.450", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 7.1, "baseSeverity": "HIGH", "confidentialityImpact": "NONE", "integrityImpact": "LOW", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:H", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 4.2, "source": "security-advisories@github.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-28402", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-03-03T20:31:49.868298Z", "version": "2.0.3"}}]}, "published": "2026-02-27T22:16:23.343", "references": [{"source": "security-advisories@github.com", "tags": ["Patch"], "url": "https://github.com/nimiq/core-rs-albatross/commit/6454c26d966858c5520f55739a30b94c17656c85"}, {"source": "security-advisories@github.com", "tags": ["Patch"], "url": "https://github.com/nimiq/core-rs-albatross/pull/3623"}, {"source": "security-advisories@github.com", "tags": ["Release Notes"], "url": "https://github.com/nimiq/core-rs-albatross/releases/tag/v1.2.2"}, {"source": "security-advisories@github.com", "tags": ["Third Party Advisory"], "url": "https://github.com/nimiq/core-rs-albatross/security/advisories/GHSA-7wh6-rmxx-ww47"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-354"}], "source": "security-advisories@github.com", "type": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,1.2.2)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "cna", "scores": [{"score": 100.0, "source": "cna"}]}, "original": {"product": "core-rs-albatross", "source": "cna", "vendor": "nimiq"}, "product": "core-rs-albatross", "vendor": "nimiq"}], "analysis": {"en": {"generated_at": "2026-04-17T13:54:06.628737+00:00", "value": {"mitigation_remediation": ["Apply the v1.2.2 patch or newer to all validator nodes.", "Restart the validator services after the patch to clear any stale state.", "Perform a network health check to confirm consensus remains functional and the node is participating normally."], "summary": {"action": "Upgrade", "impact": "Node Crash via Validator Exclusion"}, "threat_synthesis": {"affected_systems": "The vulnerability affects the nimiq core-rs-albatross implementation of the Nimiq Proof\u2011of\u2011Stake blockchain. All validator nodes running versions older than 1.2.2 are susceptible. The fix is included in release v1.2.2.", "description_and_impact": "The flaw stems from missing validation that a header\u2019s body_root matches the hash of the actual macro body. Prior to v1.2.2, a malicious or compromised validator elected as proposer could submit a proposal with a mismatched body_root. The proposal passes initial checks, but downstream code expects the binding and may panic on the mismatch, causing the validator to crash. This results in denial\u2011of\u2011service for the impacted node while leaving the network functional but with a reduced set of healthy validators.", "risk_and_exploitability": "The CVSS score is 7.1, indicating a high severity. The EPSS score is less than 1\u202f%, so exploitation is considered unlikely at present. The vulnerability is not listed in CISA\u2019s KEV catalog. An attacker must control a validator and be elected as proposer to exploit it; thus the attack vector is internal validator election, and the impact is limited to the compromised node. A crash of the validator can disrupt the consensus process if the node holds a significant stake, but the network can tolerate a few nodes going offline. As no public workaround exists, the recommendation is to apply the patch."}}}}, "created": "2026-03-02T12:04:50.451152+00:00", "updated": "2026-04-17T14:00:15.809037+00:00", "vendors": ["nimiq", "nimiq$PRODUCT$core-rs-albatross"]}