Vulnerability in Form-data
CVE-2026-12143
form-data is a library for creating readable multipart/form-data streams. In versions through 4.0.5, the `field` argument to `FormData#append` and the `filename` option are concatenated verbatim into the `Content-Disposition` header withou…
Vulnerability class: CRLF Injection
EPSS: 0.005 (42.0th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N.
Affected products
- Form-data — versions 0, 3.0.0, 4.0.0
Weakness classification (CWE)
References
- 7ffcee3d-2c14-4c3e-b844-86c6a321a158 (technical-description)
- 7ffcee3d-2c14-4c3e-b844-86c6a321a158 (patch)
- 7ffcee3d-2c14-4c3e-b844-86c6a321a158 (patch)
- 7ffcee3d-2c14-4c3e-b844-86c6a321a158 (patch)
- 7ffcee3d-2c14-4c3e-b844-86c6a321a158 (vendor-advisory)
- 7ffcee3d-2c14-4c3e-b844-86c6a321a158 (technical-description)
- 7ffcee3d-2c14-4c3e-b844-86c6a321a158 (product)
- 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
- 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
- 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
Frequently asked questions
- What is CVE-2026-12143?
- CVE-2026-12143 is a high-severity vulnerability in Form-data, classified under CRLF Injection. CVSS score: 7.5/10. Published 2026-06-12.
- How severe is CVE-2026-12143?
- High severity. CVSS v3 base score is 7.5 out of 10.