express-session-1.15.6.tgz: 1 vulnerabilities (highest severity is: 4.6) [master] (reachable)

[mend-developer-platform-dev]

📂 Vulnerable Library - express-session-1.15.6.tgz

Simple session middleware for Express

Path to dependency file: /package.json

Findings

Finding	Severity	🎯 CVSS	Exploit Maturity	EPSS	Library	Type	Fixed in	Remediation Available	Reachability
CVE-2025-7339	🟠 Medium	4.6	Not Defined	< 1%	on-headers-1.0.1.tgz	Transitive	N/A	❌	Reachable

Details

🟠CVE-2025-7339

Vulnerable Library - on-headers-1.0.1.tgz

Execute a listener when a response is about to write headers

Library home page: https://registry.npmjs.org/on-headers/-/on-headers-1.0.1.tgz

Path to dependency file: /package.json

Dependency Hierarchy:

• express-session-1.15.6.tgz (Root Library)
  • ❌ on-headers-1.0.1.tgz (Vulnerable Library)

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Reachability Analysis

This vulnerability is potentially reachable:

- owasp-nodejs-goat-1.3.0/server.js (Application)
    - express-session-1.15.6/index.js (Extension)
        -> ❌ on-headers-1.0.1/index.js (Vulnerable Component)

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Vulnerability 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.
Mend Note: The description of this vulnerability differs from MITRE.

Publish Date: Jul 17, 2025 03:47 PM

URL: CVE-2025-7339

Threat Assessment

Exploit Maturity:Not Defined

EPSS:< 1%

Score: 4.6

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Suggested Fix

Type: Upgrade version

Origin:

Release Date:

Fix Resolution :