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{}

{"bugzilla": {"description": "oj: Oj: Heap corruption via crafted JSON object key", "id": "2495759", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2495759"}, "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-131", "details": ["Oj (Optimized JSON) is a JSON parser and Object marshaller packaged as a Ruby gem. In versions prior to 3.17.2, when in usual mode with create_id enabled, Oj::Parser#parse is vulnerable to heap corruption via a negative-size memcpy. When a JSON object key is exactly 65,535 bytes long, an integer truncation in form_attr (usual.c:63) converts the length to -1 before passing it to memcpy. This causes memcpy to copy SIZE_MAX bytes (interpreted as a huge size_t), corrupting heap memory and crashing the process. The issue has been fixed in version 3.17.2.", "A flaw was found in Oj, a Ruby gem for JSON parsing. When processing a specially crafted JSON object key of a specific length (65,535 bytes) in usual mode with create_id enabled, an integer truncation vulnerability occurs. This leads to a negative size being passed to the `memcpy` function, causing heap memory corruption and crashing the process. A remote attacker could exploit this to cause a denial of service."], "name": "CVE-2026-54900", "public_date": "2026-06-30T23:34:05Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-54900\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-54900\nhttps://github.com/ohler55/oj/security/advisories/GHSA-9cv6-qcjw-4grx"], "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"}

{"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": "2026-07-01T01:15:16.574154+00:00", "updated": "2026-07-01T15:15:04.145621+00:00", "vendors": ["ohler", "ohler$PRODUCT$oj"]}