CVE-2026-40345

{"id": "CVE-2026-40345", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-40345", "role": "CISA Coordinator", "options": [{"exploitation": "poc"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "version": "2.0.3", "timestamp": "2026-08-21T16:27:55.525819Z"}}], "cvssMetricV40": [{"type": "Secondary", "source": "security-advisories@github.com", "cvssData": {"Safety": "NOT_DEFINED", "version": "4.0", "Recovery": "NOT_DEFINED", "baseScore": 8.2, "Automatable": "NOT_DEFINED", "attackVector": "NETWORK", "baseSeverity": "HIGH", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X", "exploitMaturity": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED", "userInteraction": "NONE", "attackComplexity": "LOW", "attackRequirements": "PRESENT", "privilegesRequired": "NONE", "subIntegrityImpact": "NONE", "vulnIntegrityImpact": "NONE", "integrityRequirement": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "vulnAvailabilityImpact": "HIGH", "availabilityRequirement": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "subConfidentialityImpact": "NONE", "vulnConfidentialityImpact": "NONE", "confidentialityRequirement": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED"}}]}, "affected": [{"source": "security-advisories@github.com", "affectedData": [{"vendor": "RebeccaStevens", "product": "deepmerge-ts", "versions": [{"status": "affected", "version": "< 8.0.0"}]}]}], "published": "2026-08-20T17:17:29.783", "references": [{"url": "https://github.com/RebeccaStevens/deepmerge-ts/commit/398492757b3f22a0d7d89b09ce1ae9cd32806c9a", "source": "security-advisories@github.com"}, {"url": "https://github.com/RebeccaStevens/deepmerge-ts/pull/707", "source": "security-advisories@github.com"}, {"url": "https://github.com/RebeccaStevens/deepmerge-ts/releases/tag/v8.0.0", "source": "security-advisories@github.com"}, {"url": "https://github.com/RebeccaStevens/deepmerge-ts/security/advisories/GHSA-ggr8-5vv4-36mx", "source": "security-advisories@github.com"}, {"url": "https://github.com/RebeccaStevens/deepmerge-ts/security/advisories/GHSA-ggr8-5vv4-36mx", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"}], "vulnStatus": "Deferred", "weaknesses": [{"type": "Secondary", "source": "security-advisories@github.com", "description": [{"lang": "en", "value": "CWE-674"}]}], "descriptions": [{"lang": "en", "value": "deepmerge-ts is a typescript library providing functionality to deep merging of javascript objects. Prior to 8.0.0, the deepmerge, deepmergeCustom, deepmergeInto, and deepmergeIntoCustom APIs do not track visited objects or object pairs when recursively merging records. When two input values contain self-references at the same property path, the merge logic repeatedly revisits the same pair until Node.js raises RangeError: Maximum call stack size exceeded. Applications that merge attacker-controlled recursive object graphs can synchronously crash the affected process or cause repeated worker restarts. Plain JSON input alone cannot create the recursive graph required to trigger the issue. This issue is fixed in version 8.0.0."}, {"lang": "es", "value": "deepmerge-ts es una biblioteca de typescript que proporciona funcionalidad para la fusi\u00f3n profunda de objetos javascript. Antes de la versi\u00f3n 8.0.0, las APIs deepmerge, deepmergeCustom, deepmergeInto y deepmergeIntoCustom no rastrean los objetos visitados o los pares de objetos al fusionar registros recursivamente. Cuando dos valores de entrada contienen autorreferencias en la misma ruta de propiedad, la l\u00f3gica de fusi\u00f3n revisita repetidamente el mismo par hasta que Node.js lanza RangeError: Maximum call stack size exceeded. Las aplicaciones que fusionan grafos de objetos recursivos controlados por el atacante pueden bloquear sincr\u00f3nicamente el proceso afectado o causar reinicios repetidos de los workers. La entrada JSON simple por s\u00ed sola no puede crear el grafo recursivo necesario para desencadenar el problema. Este problema est\u00e1 solucionado en la versi\u00f3n 8.0.0."}], "lastModified": "2026-10-18T20:10:00.110", "sourceIdentifier": "security-advisories@github.com"}