Security context

What an agent needs to avoid regressing past fixes and find the next vuln in this repo.

jonschlinkert/merge-deep

              master @ 628ff47
            

Fixes

CVEs

CRITICAL

Peak severity

Highlights

Prototype Pollution: 2 prior fixes. Scrutinize any change in this area.

index.js: most-fixed (2 issues). 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.

Prototype Pollution: Recursive deep merge operations in index.js allowed untrusted input to traverse and pollute the global Object prototype via unsafe key assignments. Security fixes had to be applied iteratively to block various injection vectors including '__proto__', 'constructor', and 'prototype' properties. Any future changes to the merging or copying logic must preserve these critical key blocklists.