CVE-2025-7339 – “On-Headers Header Modification Vulnerability”

The following table lists the changes that have been made to the
CVE-2025-7339 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution
of a vulnerability, and for identifying the most recent changes that may
impact the vulnerability’s severity, exploitability, or other characteristics.

  • New CVE Received
    by ce714d77-add3-4f53-aff5-83d477b104bb

    Jul. 17, 2025

    Action Type Old Value New Value
    Added Description 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.
    Added CVSS V3.1 AV:L/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:N
    Added CWE CWE-241
    Added Reference https://cna.openjsf.org/security-advisories.html
    Added Reference https://github.com/expressjs/morgan/issues/315
    Added Reference https://github.com/jshttp/on-headers/commit/c6e384908c9c6127d18831d16ab0bd96e1231867
    Added Reference https://github.com/jshttp/on-headers/issues/15
    Added Reference https://github.com/jshttp/on-headers/security/advisories/GHSA-76c9-3jph-rj3q
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