Prototype Pollution

Axios is vulnerable to prototype pollution. The vulnerability is due to nested request option objects being read without validating own properties, which allows an attacker to exploit pre-existing Object.prototype pollution to inject inherited authentication values or alter query-string...

CVE-2026-67319

axios before 0.33.0 and 1.x before 1.18.0 can consume inherited properties from nested request option objects when the JavaScript process's Object.prototype has already been polluted by another component. While the top-level merged config uses a null prototype, nested plain objects such as auth a...

CVE-2026-67319

Axios before 0.33.0 (and 1.x before 1.18.0) is vulnerable to prototype pollution via nested request option objects. When Object.prototype is polluted, nested plain objects (e.g., auth, paramsSerializer) are cloned into ordinary objects and read without own-property checks, potentially injecting a...

GHSA-7Q8Q-RJ6J-MHJQ Axios: Nested axios option objects can consume polluted prototype values

Summary Axios can consume inherited properties from nested request option objects when the JavaScript process already has a polluted Object.prototype. The top-level merged config is protected with a null prototype, but nested plain objects such as auth and paramsSerializer are cloned into ordinar...