CVE-2026-54903

Oj (Optimized JSON) is a JSON parser and Object marshaller packaged as a Ruby gem. In versions prior to 3.17.2, Oj.load is vulnerable to heap corruption when parsing a JSON string longer than 2 GB. An integer overflow in buf_append_string (buf.h:61) converts the string length to a large negative size_t, causing memcpy to copy an astronomically large amount of data out of bounds. This crashes the process and can corrupt adjacent heap memory. The issue has been fixed in version 3.17.2.

CVSS

No CVSS.

References

Link	Resource
https://github.com/ohler55/oj/security/advisories/GHSA-475m-ph3x-64gp

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-2026-54903

Mitre link : CVE-2026-54903

CVE.ORG link : CVE-2026-54903

JSON object : View

Products Affected

No product.

CWE

CWE-190

Integer Overflow or Wraparound

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