CVE-2025-7339

LOW3.4

on-headers vulnerable to http response header manipulation

Published Jul 17, 2025

Modified 7 months ago

Details

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.

References

WEB

https://cna.openjsf.org/security-advisories.html

WEB

https://github.com/expressjs/morgan/issues/315

WEB

https://github.com/jshttp/on-headers/commit/c6e384908c9c6127d18831d16ab0bd96e1231867

WEB

https://github.com/jshttp/on-headers/issues/15

WEB

https://github.com/jshttp/on-headers/security/advisories/GHSA-76c9-3jph-rj3q

ADVISORY