CRLF injection in form-data - CVE-2026-12143

 

CRLF injection in form-data - CVE-2026-12143

Published: July 21, 2026


Vulnerability identifier: #VU138926
CSH Severity: High
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:U/U:Amber
CVE-ID: CVE-2026-12143
CWE-ID: CWE-93
Exploitation vector: Remote access
Exploit availability: No public exploit available
Vendor: FormData
Affected software:
form-data

Detailed vulnerability description

The vulnerability allows a remote attacker to inject arbitrary data in server response.

The vulnerability exists due to insufficient validation of attacker-supplied data. A remote attacker can pass specially crafted data to the application containing CR-LF characters and modify application behavior.


How to mitigate CVE-2026-12143

Install updates from vendor's website.

Sources