Axios has Unrestricted Cloud Metadata Exfiltration via Header Injection Chain — CVE-2026-40175

Summary

# Vulnerability Disclosure: Unrestricted Cloud Metadata Exfiltration via Header Injection Chain ## Summary The Axios library is vulnerable to a specific gadget-style attack chain in which **prototype pollution** in a third-party dependency may be leveraged to inject unsanitized header values into outbound requests. Axios can be used as a gadget after pollution occurs elsewhere because header values merged from…

Product

npm: axios

What to do

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

• Review exposure and plan remediation based on risk and environment.
• 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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