Vulnerability Description
Ruby JSON is a JSON implementation for Ruby. Versions 2.9.0 through 2.19.8 are vulnerable to heap buffer overflow when the JSON generator is provided with an oversized streamed object. When streaming to an IO JSON.dump(obj, io) and JSON::State#generate(obj, io) can write past the internal JSON generator buffer when a streamed object contains an attacker-controlled string near 16 KB. Exploitation would result in a reliable process crash/denial of service. This issue has been fixed in version 2.19.9.
CVSS Score
LOW
Related Weaknesses (CWE)
References
- https://github.com/ruby/json/releases/tag/v2.19.9
- https://github.com/ruby/json/security/advisories/GHSA-x2f5-4prf-w687
- https://github.com/ruby/json/security/advisories/GHSA-x2f5-4prf-w687
FAQ
What is CVE-2026-54696?
CVE-2026-54696 is a vulnerability with a CVSS score of 3.7 (LOW). Ruby JSON is a JSON implementation for Ruby. Versions 2.9.0 through 2.19.8 are vulnerable to heap buffer overflow when the JSON generator is provided with an oversized streamed object. When streaming ...
How severe is CVE-2026-54696?
CVE-2026-54696 has been rated LOW with a CVSS base score of 3.7/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-54696?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.