CVE-2026-42033

Axios: Prototype Pollution Gadgets - Response Tampering, Data Exfiltration, and Request Hijacking

Axios is a promise based HTTP client for the browser and Node.js. Prior to 1.15.1 and 0.31.1, when Object.prototype has been polluted by any co-dependency with keys that axios reads without a hasOwnProperty guard, an attacker can (a) silently intercept and modify every JSON response before the application sees it, or (b) fully hijack the underlying HTTP transport, gaining access to request credentials, headers, and body. The precondition is prototype pollution from a separate source in the same process. This vulnerability is fixed in 1.15.1 and 0.31.1.

Affected

axios

CVSS v3.1 CNA

7.4 HIGHCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N

EPSS

0.92% chance of exploitation in the next 30 days, 60th percentile

Published

2026-04-24

Updated

2026-09-10

Proof-of-concept exploits (1)

• advisories/GHSA-pf86-5x62-jrwf

Security advisories

• axios/axios/security/advisories/GHSA-pf86-5x62-jrwf

References

• CVE Record
• NVD entry