Vulnerability · Published Apr 24, 2026 · Assigned by GitHub_M
CVE-2026-42037Axios: CRLF Injection in multipart/form-data body via unsanitized blob.type in formDataToStream
Medium 5.3
In plain English
A medium-severity security flaw in axios from axios. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 22% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official description
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 & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | node-axios | no fix listed | DEBIAN-CVE-2026-42037 |
| Debian:13 | node-axios | no fix listed | DEBIAN-CVE-2026-42037 |
| Debian:14 | node-axios | 1.15.2-1 | DEBIAN-CVE-2026-42037 |
| Ubuntu:25.10 | node-axios | no fix listed | UBUNTU-CVE-2026-42037 |
| Ubuntu:26.10 | node-axios | no fix listed | UBUNTU-CVE-2026-42037 |
| npm | axios | 1.15.1 | GHSA-445q-vr5w-6q77 |
Affected products (as reported)
Weakness: CWE-93 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
References
- https://github.com/axios/axios/security/advisories/GHSA-445q-vr5w-6q77 x_refsource_CONFIRM