CVE-2026-52734

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{"affected": [{"affectedData": [{"product": "zebra", "vendor": "ZcashFoundation", "versions": [{"status": "affected", "version": "< 4.5.0"}]}], "source": "security-advisories@github.com"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "ZEBRA is a Zcash node written entirely in Rust. Prior to 4.5.0, an unauthenticated P2P peer can cause the mempool download pipeline to retain transactions after verification reaches the outer RATE_LIMIT_DELAY timeout. In zebrad/src/components/mempool/downloads.rs, Downloads::poll_next removed cancel_handles entries after success and ordinary verification errors, but tokio::time::error::Elapsed did not carry the UnminedTxId needed to remove the timed-out entry. Each retained cancel_handles entry could hold a full Gossip::Tx(UnminedTx), while normal mined-transaction cleanup could not match attacker transactions and no periodic garbage collection or count cap existed. Sustained traffic therefore caused monotonic memory growth until swap pressure degraded the node or the operating system terminated the zebrad process for exhausting memory. This issue is fixed in version 4.5.0."}, {"lang": "es", "value": "ZEBRA es un nodo Zcash escrito completamente en Rust. Antes de la versi\u00f3n 4.5.0, un par P2P no autenticado puede provocar que la tuber\u00eda de descarga del mempool retenga transacciones despu\u00e9s de que la verificaci\u00f3n alcance el tiempo de espera externo RATE_LIMIT_DELAY. En zebrad/src/components/mempool/downloads.rs, Downloads::poll_next eliminaba las entradas de cancel_handles despu\u00e9s de un \u00e9xito y de errores de verificaci\u00f3n ordinarios, pero tokio::time::error::Elapsed no conten\u00eda el UnminedTxId necesario para eliminar la entrada que hab\u00eda expirado. Cada entrada de cancel_handles retenida pod\u00eda contener un Gossip::Tx(UnminedTx) completo, mientras que la limpieza normal de transacciones minadas no pod\u00eda coincidir con las transacciones del atacante y no exist\u00eda una recolecci\u00f3n de basura peri\u00f3dica ni un l\u00edmite de conteo. El tr\u00e1fico sostenido, por lo tanto, causaba un crecimiento monot\u00f3nico de la memoria hasta que la presi\u00f3n del swap degradaba el nodo o el sistema operativo terminaba el proceso zebrad por agotar la memoria. Este problema est\u00e1 solucionado en la versi\u00f3n 4.5.0."}], "id": "CVE-2026-52734", "lastModified": "2026-10-22T22:10:00.250", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "LOW", "baseScore": 5.3, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 1.4, "source": "security-advisories@github.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-52734", "options": [{"exploitation": "none"}, {"automatable": "yes"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-08-19T18:17:27.998662Z", "version": "2.0.3"}}]}, "published": "2026-08-18T20:17:17.080", "references": [{"source": "security-advisories@github.com", "url": "https://github.com/ZcashFoundation/zebra/commit/1440b43ca7df59aca948090d45117557b217a6cd"}, {"source": "security-advisories@github.com", "url": "https://github.com/ZcashFoundation/zebra/releases/tag/v4.5.0"}, {"source": "security-advisories@github.com", "url": "https://github.com/ZcashFoundation/zebra/security/advisories/GHSA-65jj-fmw8-468q"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Deferred", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-401"}], "source": "security-advisories@github.com", "type": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,4.5.0)"}}], "enrichment": {"confidence": 95.0, "confidence_source": "inferred", "scores": [{"score": 95.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "zebra", "source": "cna", "vendor": "ZcashFoundation"}, "product": "zebra", "vendor": "zcashfoundation"}], "created": "2026-08-18T20:45:04.514711+00:00", "updated": "2026-08-18T22:15:04.357881+00:00", "vendors": ["zcashfoundation", "zcashfoundation$PRODUCT$zebra"]}