CVE-2026-67314: Axios

Medium severity, CVSS 6.5. EPSS: 0.4% chance of exploitation in the next 30 days.

axios versions >=1.15.2 and <1.18.0 contain prototype-pollution read-side gadgets in Basic auth subfield handling (lib/adapters/http.js and lib/helpers/resolveConfig.js). When an application is already affected by a separate prototype-pollution primitive and makes an axios request with an own auth object that omits the username and/or password properties, axios reads the inherited Object.prototype.username and Object.prototype.password values and uses them to construct an outbound 'Authorization: Basic ...' header. axios itself does not pollute prototypes. The practical impact is outbound request tampering: an attacker who controls the polluted prototype values can inject attacker-chosen Basic auth credentials or replace an existing Authorization header. Credential disclosure is only possible under additional application-specific conditions.

Affected products

• Axios Axios: from 1.15.2, before 1.18.0 (fixed in 1.18.0)

Published 2026-08-01. Last modified 2026-09-01.