CVE-2026-67316: axios before 1.18.0 Prototype Pollution via bodyless methods

Severity: high (CVSS 7.4 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2026-08-01 · updated 2026-09-01
Weakness: CWE-1321

Description

axios is vulnerable to read-side prototype-pollution gadgets that can alter request construction when Object.prototype has already been polluted by a separate vulnerability or dependency. In the bodyless method aliases (axios.get(), axios.delete(), axios.head(), axios.options()), inherited data is read via (config || {}).data before config normalization, causing an attacker-controlled body to be sent on requests that did not set one. Additional low-level paths, only reachable when calling exported adapters/helpers (e.g. lib/adapters/http.js, unsafe/helpers/resolveConfig.js) directly with plain configs and no own proxy or paramsSerializer, can inherit polluted proxy values (routing requests through an attacker-controlled proxy) or paramsSerializer values (attacker-controlled URL serialization). These low-level gadgets do not reproduce through normal high-level axios calls on 1.15.2+. The issue is fixed in axios 1.18.0 and 0.33.0.

Affected products

axios: before 0.33.0; from 1.0.0 before 1.18.0 — fixed in 0.33.0, 1.18.0
Npm Axios: from 1.0.0 before 1.18.0; before 0.33.0 — fixed in 1.18.0, 0.33.0

How to fix

Upgrade to a fixed version: axios 0.33.0, 1.18.0; Npm Axios 1.18.0, 0.33.0. Check the vendor advisory for mitigations.

References

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