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CVE

CWE

Training

CVE-2025-7339

Published: Jul 17, 2025

Modified: Jul 17, 2025

PUBLISHED

CVSS v3.1

3.4

LOW

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.

Vendor	Product	Versions
jshttp	on-headers	affected `0 - < 1.1.0`

Weaknesses (CWE)

CVSS v3.1 Details

CVSS v3.1 Vector

CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:N

Attack Vector

Local

Attack Complexity

Low

Privileges Required

High

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

Low

Availability

None

References

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

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

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

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

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

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