CVE-2025-7339
on-headers is a node.js middleware for listening to when a response writes headers. 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(). Users should upgrade to version 1.1.0 to receive a patch. Uses are strongly 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.
| Software | From | Fixed in |
|---|---|---|
jshttp / on-headers
|
- | 1.1.0 |
- https://cna.openjsf.org/security-advisories.html
- https://github.com/expressjs/morgan/issues/315
- https://github.com/jshttp/on-headers/commit/c6e384908c9c6127d18831d16ab0bd96e1231867
- https://github.com/jshttp/on-headers/issues/15
- https://github.com/jshttp/on-headers/security/advisories/GHSA-76c9-3jph-rj3q
Deep Security Visibility Without the Complexity
SynScan provides clear, real-time security insights so you can monitor your attack surface, spot risks early, and act fast—without extra complexity.
- No setup fees
- 5-min deployment
- Cancel anytime