Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution') in @ranfdev/deepobj — CVE-2026-46509

Summary

### Impact Prototype pollution is possible when property paths contain `__proto__`/`constructor`/`prototype`. The property path must not be exposed as user input.

Product

npm: @ranfdev/deepobj

What to do

General, cautious steps (verify details in the official source):

• Prioritize patching or mitigation immediately (treat as actively risky).
• Identify affected product versions in your inventory and verify whether you are impacted.
• Apply vendor patches/updates or recommended mitigations as soon as available.
• Read the official advisory for exact affected versions and remediation steps.

Official advisory

• Read the official source
• CVE Record
• NVD

Related advisories