AIKIDO-2026-11154
oj is vulnerable to Stack-based Buffer Overflow
31
Low Risk
This Affects:
ojTL;DR
The Oj.dump serializer accepts an integer indent option without bounding its magnitude. When an extreme indent value is supplied, fill_indent writes far beyond the stack-allocated output buffer and corrupts the stack. Before the fix, this could crash the Ruby process handling the dump call. The patch rejects indent values above a small fixed maximum.
Who does this affect?
You are affected if you are using a version that falls within the vulnerable range and untrusted input can influence the indent option passed to Oj.dump.
Background info
oj is vulnerable to Stack-based Buffer Overflow in versions 0.0.1 - 3.17.1.
How to fix this
Upgrade the oj library to the patch version.
Are You Affected?
Connect your repositories to instantly see whether vulnerable or malicious packages exist in your codebase.
Free. No credit card required.
SOC 2Compliant
ISO 27001Compliant