CVE-2026-67215

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A patch containing add and copy operations grafts duplicated subtrees to amplify document depth beyond the parser's nesting limit: cJSON_Delete() recurses with no depth bound, and the cJSON_Duplicate() guard CJSON_CIRCULAR_LIMIT is set to 10000, ten times the parser's 1000-level nesting limit and high enough to overflow a default thread stack. An attacker who can supply the patch document can crash the process, resulting in denial of service."}, {"lang": "es", "value": "cJSON hasta la versi\u00f3n 1.7.19 es vulnerable a una recursi\u00f3n incontrolada que conduce al agotamiento de la pila cuando se aplica un parche JSON RFC 6902 no confiable a trav\u00e9s de cJSONUtils_ApplyPatches() o cJSONUtils_ApplyPatchesCaseSensitive(). Un parche que contiene operaciones de adici\u00f3n y copia injerta sub\u00e1rboles duplicados para amplificar la profundidad del documento m\u00e1s all\u00e1 del l\u00edmite de anidamiento del analizador: cJSON_Delete() recurre sin l\u00edmite de profundidad, y el guardi\u00e1n CJSON_CIRCULAR_LIMIT de cJSON_Duplicate() est\u00e1 configurado en 10000, diez veces el l\u00edmite de anidamiento de 1000 niveles del analizador y lo suficientemente alto como para desbordar una pila de hilos predeterminada. Un atacante que puede proporcionar el documento del parche puede bloquear el proceso, lo que resulta en denegaci\u00f3n de servicio."}], "id": "CVE-2026-67215", "lastModified": "2026-10-23T23:10:00.157", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 7.5, "baseSeverity": "HIGH", "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:H", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 3.6, "source": "disclosure@vulncheck.com", "type": "Secondary"}], "cvssMetricV40": [{"cvssData": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "NONE", "attackVector": "NETWORK", "availabilityRequirement": "NOT_DEFINED", "baseScore": 8.7, "baseSeverity": "HIGH", "confidentialityRequirement": "NOT_DEFINED", "exploitMaturity": "NOT_DEFINED", "integrityRequirement": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "privilegesRequired": "NONE", "providerUrgency": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "userInteraction": "NONE", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/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", "version": "4.0", "vulnAvailabilityImpact": "HIGH", "vulnConfidentialityImpact": "NONE", "vulnIntegrityImpact": "NONE", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "source": "disclosure@vulncheck.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-67215", "options": [{"exploitation": "none"}, {"automatable": "yes"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-07-29T14:32:48.962567Z", "version": "2.0.3"}}]}, "published": "2026-07-29T14:16:35.187", "references": [{"source": "disclosure@vulncheck.com", "tags": ["Patch"], "url": "https://github.com/DaveGamble/cJSON/blob/v1.7.19/cJSON.c#L253-L261"}, {"source": "disclosure@vulncheck.com", "tags": ["Patch"], "url": "https://github.com/DaveGamble/cJSON/blob/v1.7.19/cJSON_Utils.c#L906-L940"}, {"source": "disclosure@vulncheck.com", "tags": ["Exploit", "Press/Media Coverage", "Third Party Advisory"], "url": "https://joshua.hu/cjson-json-parser-cve-vulnerabilities"}, {"source": "disclosure@vulncheck.com", "tags": ["Third Party Advisory"], "url": "https://www.vulncheck.com/advisories/cjson-json-patch-copy-add-uncontrolled-recursion-stack-exhaustion"}, {"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "tags": ["Exploit", "Press/Media Coverage", "Third Party Advisory"], "url": "https://joshua.hu/cjson-json-parser-cve-vulnerabilities"}], "sourceIdentifier": "disclosure@vulncheck.com", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-674"}], "source": "disclosure@vulncheck.com", "type": "Secondary"}]}

{}

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