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{"bugzilla": {"description": "oj: Oj: Denial of Service via deeply nested JSON input", "id": "2495750", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2495750"}, "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-120", "details": ["Oj (Optimized JSON) is a JSON parser and Object marshaller packaged as a Ruby gem. In versions prior to 3.17.3, Oj::Doc#each_child, when invoked recursively over a deeply nested JSON document, overflows a fixed-size stack buffer and aborts the process, leading to DoS. In a two-step chain in ext/oj/fast.c, doc_each_child increments doc->where past the where_path[MAX_STACK = 100] array with no bounds check and never restores it (the doc->where-- is missing), so calling each_child recursively from inside the yield block drives doc->where beyond the array. On the next entry the function copies the path into the 800-byte stack-local buffer save_path[MAX_STACK] using wlen = doc->where - doc->where_path, so when the previous recursive call left doc->where past where_path[100] the wlen exceeds MAX_STACK and the memcpy overflows save_path on the C stack; because the Oj::Doc parser imposes no JSON nesting-depth limit (relying on a C-stack pressure check), deeply nested attacker input reaches this path. This issue has been fixed in version 3.17.3.", "A flaw was found in Oj, a Ruby gem for JSON parsing. A remote attacker can exploit this vulnerability by providing a deeply nested JSON document. This can lead to a stack buffer overflow in the `Oj::Doc#each_child` function, causing the process to abort and resulting in a denial of service (DoS) for the affected system."], "name": "CVE-2026-54592", "public_date": "2026-06-30T23:16:24Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-54592\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-54592\nhttps://github.com/ohler55/oj/security/advisories/GHSA-3m6q-jj5j-38c9"], "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": "[0,3.17.3)"}}], "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": "2026-07-01T00:30:06.559954+00:00", "updated": "2026-07-01T13:30:15.502708+00:00", "vendors": ["ohler", "ohler$PRODUCT$oj"]}