SecuriTricks - CVE-2025-7339

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.

Product(s) Impacted

Vendor	Product	Versions
On-headers	On-headers	<1.1.0

Weaknesses

Common security weaknesses mapped to this vulnerability.

CWE-241

Improper Handling of Unexpected Data Type

The product does not handle or incorrectly handles when a particular element is not the expected type, e.g. it expects a digit (0-9) but is provided with a letter (A-Z).

*CPE(s)

Affected systems and software identified for this CVE.

Type	Vendor	Product	Version	Update	Edition	Language	Software Edition	Target Software	Target Hardware	Other Information
a	on-headers	on-headers	<1.1.0	/	/	/	/	/	/	/

References

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

CVSS Score

3.4 / 10

CVSS Data - 3.1

Attack Vector: LOCAL
Attack Complexity: LOW
Privileges Required: HIGH
Scope: UNCHANGED
Confidentiality Impact: LOW
Integrity Impact: LOW
Availability Impact: NONE

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

View Vector String

Timeline

Published: July 17, 2025, 4:15 p.m.
Last Modified: July 17, 2025, 9:15 p.m.

Status : Awaiting Analysis

CVE has been recently published to the CVE List and has been received by the NVD.

More info

Source

ce714d77-add3-4f53-aff5-83d477b104bb

CVE-2025-7339