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{"bugzilla": {"description": "oj: Oj: Heap buffer overflow in exception serialization", "id": "2495716", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2495716"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.8", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/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, when in object mode, Oj.dump is vulnerable to a heap buffer overflow when serializing Exception objects with a large :indent value. The serializer allocates a buffer sized for the object's attributes but does not account for the indent bytes added on each write. With indent: 5000, the accumulation of 5,000-byte indent strings overflows the 13,150-byte heap allocation, corrupting adjacent heap memory. This issue has been fixed in version 3.17.2.", "A flaw was found in Oj (Optimized JSON), a Ruby gem used for processing JSON data. This vulnerability occurs when the software attempts to serialize (convert into a format for storage or transmission) Exception objects with a very large indentation setting. The internal process for handling this serialization does not properly manage memory, leading to a heap buffer overflow. This memory corruption could allow an attacker to disrupt the application, causing a denial of service, or potentially execute unauthorized code."], "name": "CVE-2026-54896", "public_date": "2026-06-30T23:20:27Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-54896\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-54896\nhttps://github.com/ohler55/oj/security/advisories/GHSA-35w3-pjm6-wj95"], "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": "2026-07-01T01:00:14.245168+00:00", "updated": "2026-07-01T13:30:15.502223+00:00", "vendors": ["ohler", "ohler$PRODUCT$oj"]}