express-session-1.15.6.tgz: 1 vulnerabilities (highest severity is: 3.4) reachable

[dev-mend-for-github-com]

Vulnerable Library - express-session-1.15.6.tgz

Path to dependency file: /NodeGoat/package.json

Path to vulnerable library: /NodeGoat/package.json

Found in HEAD commit: 0023dc1436f92133203911e0301ccd06cdb3a9c4

Vulnerabilities

Vulnerability	Severity	CVSS	Dependency	Type	Fixed in (express-session version)	Remediation Possible**	Reachability
CVE-2025-7339	Low	3.4	on-headers-1.0.1.tgz	Transitive	N/A*	❌	Reachable

*For some transitive vulnerabilities, there is no version of direct dependency with a fix. Check the "Details" section below to see if there is a version of transitive dependency where vulnerability is fixed.

**In some cases, Remediation PR cannot be created automatically for a vulnerability despite the availability of remediation

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: /NodeGoat/package.json

Path to vulnerable library: /NodeGoat/package.json

Dependency Hierarchy:

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

Found in HEAD commit: 0023dc1436f92133203911e0301ccd06cdb3a9c4

Found in base branch: main

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)

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: 2025-07-17

URL: CVE-2025-7339

CVSS 3 Score Details (3.4)

Base Score Metrics:

• Exploitability Metrics:
  • Attack Vector: Local
  • Attack Complexity: Low
  • Privileges Required: High
  • User Interaction: None
  • Scope: Unchanged
• Impact Metrics:
  • Confidentiality Impact: Low
  • Integrity Impact: Low
  • Availability Impact: None

For more information on CVSS3 Scores, click here.