CVE-2026-54896

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.

CVSS

No CVSS.

References

Link	Resource
https://github.com/ohler55/oj/security/advisories/GHSA-35w3-pjm6-wj95

Configurations

No configuration.

History

01 Jul 2026, 00:16

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-07-01 00:16

Updated : 2026-07-01 00:16

NVD link : CVE-2026-54896

Mitre link : CVE-2026-54896

CVE.ORG link : CVE-2026-54896

JSON object : View

Products Affected

No product.

CWE

CWE-122

Heap-based Buffer Overflow

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