serialize-javascript-5.0.1.tgz: 1 vulnerabilities (highest severity is: 5.9) unreachable

[mend-for-github-com]

Vulnerable Library - serialize-javascript-5.0.1.tgz

Serialize JavaScript to a superset of JSON that includes regular expressions and functions.

Library home page: https://registry.npmjs.org/serialize-javascript/-/serialize-javascript-5.0.1.tgz

Sample Path to Dependency File: /package.json

Path to vulnerable library: /package.json

Found in HEAD commit: 1e5781423c543a0c9bfedb4c5a57ca049920974b

Vulnerabilities

Vulnerability	Severity	CVSS	Exploit Maturity	EPSS	Dependency	Type	Fixed in (serialize-javascript version)	Remediation Possible**	Reachability
CVE-2026-34043	Medium	5.9	Not Defined	0.472%	serialize-javascript-5.0.1.tgz	Direct	https://github.com/yahoo/serialize-javascript.git - v7.0.5	✅	Unreachable

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

Details

CVE-2026-34043

Vulnerable Library - serialize-javascript-5.0.1.tgz

Serialize JavaScript to a superset of JSON that includes regular expressions and functions.

Library home page: https://registry.npmjs.org/serialize-javascript/-/serialize-javascript-5.0.1.tgz

Sample Path to Dependency File: /package.json

Path to vulnerable library: /package.json

Dependency Hierarchy:

• ❌ serialize-javascript-5.0.1.tgz (Vulnerable Library)

Found in HEAD commit: 1e5781423c543a0c9bfedb4c5a57ca049920974b

Found in base branch: main

Reachability Analysis

The vulnerable code is unreachable

Vulnerability Details

Serialize JavaScript to a superset of JSON that includes regular expressions and functions. Prior to version 7.0.5, there is a Denial of Service (DoS) vulnerability caused by CPU exhaustion. When serializing a specially crafted "array-like" object (an object that inherits from Array.prototype but has a very large length property), the process enters an intensive loop that consumes 100% CPU and hangs indefinitely. This issue has been patched in version 7.0.5.

Publish Date: 2026-03-31

URL: CVE-2026-34043

Threat Assessment

Exploit Maturity: Not Defined

EPSS: 0.472%

CVSS 3 Score Details (5.9)

Base Score Metrics:

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

For more information on CVSS3 Scores, click here.

Suggested Fix

Type: Upgrade version

Release Date: 2026-03-28

Fix Resolution: https://github.com/yahoo/serialize-javascript.git - v7.0.5

⛑️ Automatic Remediation will be attempted for this issue.

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⛑️Automatic Remediation will be attempted for this issue.