Prototype Pollution Gadget in Axios HTTP Adapter
CVE-2026-42264 affects Axios, a promise-based HTTP client for browsers and Node.js. In Axios versions 1.0.0 through before 1.15.2, the HTTP adapter reads five configuration properties — auth, baseURL, socketPath, beforeRedirect, and insecureHTTPParser — via direct property access without hasOwnProperty-style guards. As a result, if Object.prototype has been polluted elsewhere in the same process, Axios can inherit attacker-controlled values for these options and silently apply them to outbound HTTP requests. This makes the affected properties usable as prototype pollution gadgets. The issue is patched in Axios 1.15.2.
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