Highlights
Code Execution: 2 prior fixes. Scrutinize any change in this area.
.travis.yml: most-fixed (1 issue). Treat as high-risk during review.
2 high-severity fixes in this history; regressions here are high-impact.
Recurring patterns
The bug types that recur here, drawn from past fixes, not open vulnerabilities.
Code Execution: Unsafe Marshal.load on network-received message bodies allows remote code execution by crafting malicious serialized payloads.
Code Execution: CI used Ruby 2.2.2, vulnerable to CVE-2015-7551 (unsafe YAML deserialization), which could lead to code execution in the build environment.