CRLF injection in axios - #VU127600
Published: April 24, 2026
Vulnerability identifier: #VU127600
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: N/A
CWE-ID: CWE-93
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: axios
Affected software:
axios
axios
Detailed vulnerability description
The vulnerability allows a remote attacker to inject arbitrary multipart part headers.
The vulnerability exists due to improper neutralization of CRLF sequences in FormDataPart constructor in lib/helpers/formDataToStream.js when processing Blob/File-like object MIME types in multipart form-data generation. A remote attacker can supply a specially crafted blob.type value to inject arbitrary multipart part headers.
This issue is reachable through the public axios FormData posting API in Node.js environments that accept attacker-controlled file metadata and relay it downstream.
Remediation
Install security update from vendor's website.