Vulnerability Description
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.
Related Weaknesses (CWE)
References
- https://github.com/ohler55/oj/security/advisories/GHSA-475m-ph3x-64gp
- https://github.com/ohler55/oj/security/advisories/GHSA-475m-ph3x-64gp
FAQ
What is CVE-2026-54903?
CVE-2026-54903 is a documented vulnerability. 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...
How severe is CVE-2026-54903?
CVSS scoring is not yet available for CVE-2026-54903. Check NVD for updates.
Is there a patch for CVE-2026-54903?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.