CVE-2026-42037
Axios: CRLF Injection in multipart/form-data body via unsanitized blob.type in formDataToStream
Impact
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 packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| npm | axios | >= 1.0.0, < 1.15.1 | 1.15.1 |
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Axios | Axios | from 1.0.0 before 1.15.1 |