CVE-2026-54903

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{"affected": [{"affectedData": [{"product": "oj", "vendor": "ohler55", "versions": [{"status": "affected", "version": "< 3.17.2"}]}], "source": "security-advisories@github.com"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "Oj (Optimized JSON) is a JSON parser and Object marshaller packaged as a Ruby gem. In versions prior to 3.17.2, Oj.load is vulnerable to heap corruption when parsing a JSON string longer than 2 GB. An integer overflow in buf_append_string (buf.h:61) converts the string length to a large negative size_t, causing memcpy to copy an astronomically large amount of data out of bounds. This crashes the process and can corrupt adjacent heap memory. The issue has been fixed in version 3.17.2."}, {"lang": "es", "value": "Oj (JSON Optimizado) es un analizador JSON y un serializador de objetos empaquetado como una gema de Ruby. En versiones anteriores a la 3.17.2, Oj.load es vulnerable a la corrupci\u00f3n del mont\u00f3n al analizar una cadena JSON de m\u00e1s de 2 GB. Un desbordamiento de entero en buf_append_string (buf.h:61) convierte la longitud de la cadena en un size_t negativo grande, lo que hace que memcpy copie una cantidad astron\u00f3micamente grande de datos fuera de los l\u00edmites. Esto bloquea el proceso y puede corromper la memoria adyacente del mont\u00f3n. El problema ha sido solucionado en la versi\u00f3n 3.17.2."}], "id": "CVE-2026-54903", "lastModified": "2026-10-25T17:10:00.197", "metrics": {"cvssMetricV40": [{"cvssData": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "PRESENT", "attackVector": "NETWORK", "availabilityRequirement": "NOT_DEFINED", "baseScore": 6.3, "baseSeverity": "MEDIUM", "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:P/PR:N/UI:N/VC:N/VI:N/VA:L/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": "LOW", "vulnConfidentialityImpact": "NONE", "vulnIntegrityImpact": "NONE", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "source": "security-advisories@github.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-54903", "options": [{"exploitation": "poc"}, {"automatable": "yes"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-07-01T12:43:29.240390Z", "version": "2.0.3"}}]}, "published": "2026-07-01T00:16:33.707", "references": [{"source": "security-advisories@github.com", "url": "https://github.com/ohler55/oj/security/advisories/GHSA-475m-ph3x-64gp"}, {"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "url": "https://github.com/ohler55/oj/security/advisories/GHSA-475m-ph3x-64gp"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Deferred", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-190"}], "source": "security-advisories@github.com", "type": "Secondary"}]}

{"bugzilla": {"description": "oj: Oj: Heap corruption and Denial of Service via integer overflow in JSON parsing", "id": "2495949", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2495949"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.5", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-787", "details": ["Oj (Optimized JSON) is a JSON parser and Object marshaller packaged as a Ruby gem. In versions prior to 3.17.2, Oj.load is vulnerable to heap corruption when parsing a JSON string longer than 2 GB. An integer overflow in buf_append_string (buf.h:61) converts the string length to a large negative size_t, causing memcpy to copy an astronomically large amount of data out of bounds. This crashes the process and can corrupt adjacent heap memory. The issue has been fixed in version 3.17.2.", "A flaw was found in Oj, an Optimized JSON (JavaScript Object Notation) parser for Ruby. This vulnerability allows a remote attacker to cause heap corruption and a denial of service (DoS) by providing a JSON string larger than 2 gigabytes (GB). An integer overflow occurs when processing the string length, leading to out-of-bounds memory access and a process crash. This issue could also potentially corrupt adjacent heap memory."], "name": "CVE-2026-54903", "public_date": "2026-06-30T23:42:06Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-54903\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-54903\nhttps://github.com/ohler55/oj/security/advisories/GHSA-475m-ph3x-64gp"], "statement": "Red Hat's only product shipping the Oj Ruby gem (Compliance Backend) already includes version 3.17.3, which contains the fix for this vulnerability. No Red Hat products are affected.", "threat_severity": "Important"}

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