CVE-2026-54902

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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. Prior to version 3.17.2, is vulnerable to Use-After-Free when in SAJ mode. The Oj::Parser does not protect cached object keys (\u2265 35 bytes) from garbage collection, and a Ruby callback that triggers GC inside hash_end can cause the key string to be reclaimed while the C parser still holds a pointer to it. The subsequent access to the freed string VALUE results in a segfault, confirmed by an RIP pointing to address 0x4242 (a canary-style pattern suggesting control over the freed memory's content). This issue has been fixed in version 3.17.2."}, {"lang": "es", "value": "Oj (Optimized JSON) es un analizador JSON y un serializador de objetos empaquetado como una gema Ruby. Antes de la versi\u00f3n 3.17.2, es vulnerable a uso despu\u00e9s de liberaci\u00f3n cuando est\u00e1 en modo SAJ. El Oj::Parser no protege las claves de objetos en cach\u00e9 (? 35 bytes) de la recolecci\u00f3n de basura, y una devoluci\u00f3n de llamada de Ruby que activa la GC dentro de hash_end puede hacer que la cadena de la clave sea reclamada mientras el analizador C a\u00fan mantiene un puntero a ella. El acceso subsiguiente al VALOR de la cadena liberada resulta en un segfault, confirmado por un RIP que apunta a la direcci\u00f3n 0x4242 (un patr\u00f3n tipo canario que sugiere control sobre el contenido de la memoria liberada). Este problema ha sido solucionado en la versi\u00f3n 3.17.2."}], "id": "CVE-2026-54902", "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-2026-54902", "options": [{"exploitation": "poc"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-07-01T12:37:35.388593Z", "version": "2.0.3"}}]}, "published": "2026-07-01T00:16:33.587", "references": [{"source": "security-advisories@github.com", "url": "https://github.com/ohler55/oj/security/advisories/GHSA-m578-w5vf-rfcm"}, {"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "url": "https://github.com/ohler55/oj/security/advisories/GHSA-m578-w5vf-rfcm"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Deferred", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-416"}], "source": "security-advisories@github.com", "type": "Secondary"}]}

{"bugzilla": {"description": "Oj: Use-After-Free in Oj::Parser SAJ Long Key Callback", "id": "2495920", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2495920"}, "csaw": false, "details": ["Oj (Optimized JSON) is a JSON parser and Object marshaller packaged as a Ruby gem. Prior to version 3.17.2, is vulnerable to Use-After-Free when in SAJ mode. The Oj::Parser does not protect cached object keys (\u2265 35 bytes) from garbage collection, and a Ruby callback that triggers GC inside hash_end can cause the key string to be reclaimed while the C parser still holds a pointer to it. The subsequent access to the freed string VALUE results in a segfault, confirmed by an RIP pointing to address 0x4242 (a canary-style pattern suggesting control over the freed memory's content). This issue has been fixed in version 3.17.2."], "name": "CVE-2026-54902", "public_date": "2026-06-30T23:40:32Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-54902\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-54902\nhttps://github.com/ohler55/oj/security/advisories/GHSA-m578-w5vf-rfcm"], "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": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,3.17.2)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "manual", "scores": [{"score": 100.0, "source": "manual"}]}, "original": {"product": "oj", "source": "cna", "vendor": "ohler55"}, "product": "oj", "vendor": "ohler"}], "created": "2026-07-01T03:15:15.526471+00:00", "updated": "2026-07-06T22:48:50.074827+00:00", "vendors": ["ohler", "ohler$PRODUCT$oj"]}