Axios has prototype pollution read-side gadgets in HTTP adapter that allow credential injection and request hijacking — CVE-2026-42264

Summary

## Summary Five config properties in the HTTP adapter are read via direct property access without `hasOwnProperty` guards, making them exploitable as prototype pollution gadgets. When `Object.prototype` is polluted by another dependency in the same process, axios silently picks up these polluted values on every outbound HTTP request. ## Affected Properties 1. **`config.auth`** (`lib/adapters/http.js` line 617)…

Product

npm: axios

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

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