CVE-2026-54335 Feathersjs: Prototype pollution in @feathersjs/commons _.merge via JSON-parsed __proto__

Feathersjs is a framework for creating web APIs and real-time applications with TypeScript or JavaScript. In 5.0.44 and earlier, the .mergetarget, source utility exported by @feathersjs/commons recursively merges source into target by iterating Object.keyssource. When source was produced by...

CVE-2026-54335

Feathersjs contains a prototype-pollution vulnerability in the lodash-like merge helper: @feathersjs/commons .merge. In versions up to 5.0.44, merging a source object that originates from JSON.parse and contains proto , constructor, or prototype keys causes the merge to access target['proto '], m...