GHSA-76c9-3jph-rj3q

GitHub Security Advisory

on-headers is vulnerable to http response header manipulation

✓ GitHub Reviewed LOW Has CVE

### Impact

A bug in on-headers versions `< 1.1.0` may result in response headers being inadvertently modified when an array is passed to `response.writeHead()`

### Patches

Users should upgrade to `1.1.0`

### Workarounds

Uses are encouraged to upgrade to `1.1.0`, but this issue can be worked around by passing an object to `response.writeHead()` rather than an array.

npm on-headers

Affected versions: 0 (fixed in 1.1.0)

CVE-2025-7339

GHSA ID

GHSA-76c9-3jph-rj3q

Published

July 17, 2025 9:17 PM

Last Modified

July 17, 2025 9:17 PM

CVSS Score

2.5 /10

Primary Ecosystem

npm

Primary Package

on-headers

GitHub Reviewed

✓ Yes

Last updated: July 26, 2025 6:37 AM

Data from GitHub Advisory Database. This information is provided for research and educational purposes.