CVE-2026-42037: Axios

Medium severity, CVSS 5.3. EPSS: 0.3% chance of exploitation in the next 30 days.

Axios is a promise based HTTP client for the browser and Node.js. From 1.0.0 to before 1.15.1, the FormDataPart constructor in lib/helpers/formDataToStream.js interpolates value.type directly into the Content-Type header of each multipart part without sanitizing CRLF (\r\n) sequences. An attacker who controls the .type property of a Blob/File-like object (e.g., via a user-uploaded file in a Node.js proxy service) can inject arbitrary MIME part headers into the multipart form-data body. This bypasses Node.js v18+ built-in header protections because the injection targets the multipart body structure, not HTTP request headers. This vulnerability is fixed in 1.15.1.

Affected products

• Axios Axios: from 1.0.0, before 1.15.1 (fixed in 1.15.1)

Published 2026-04-24. Last modified 2026-06-17.