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.dump is vulnerable to a stack-based buffer overflow when a large :indent value is provided by the developer. fill_indent in dump.h calls memset(indent_str, ' ', (size_t)opts->indent) without validating the size. When opts->indent is set to INT_MAX (2,147,483,647), the (size_t) cast preserves the large value and memset writes 2 GB into the stack-allocated out buffer (4,184 bytes), corrupting the stack and crashing the process. This issue has been fixed in version 3.17.2.
Related Weaknesses (CWE)
References
- https://github.com/ohler55/oj/security/advisories/GHSA-3v45-f3vh-wg7m
- https://github.com/ohler55/oj/security/advisories/GHSA-3v45-f3vh-wg7m
FAQ
What is CVE-2026-54502?
CVE-2026-54502 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.dump is vulnerable to a stack-based buffer overflow when a large :indent value is pro...
How severe is CVE-2026-54502?
CVSS scoring is not yet available for CVE-2026-54502. Check NVD for updates.
Is there a patch for CVE-2026-54502?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.