CVE-2026-13149 (High) detected in brace-expansion-1.1.12.tgz

[mend-for-github-com]

CVE-2026-13149 - High Severity Vulnerability

Vulnerable Library - brace-expansion-1.1.12.tgz

Brace expansion as known from sh/bash

Library home page: https://registry.npmjs.org/brace-expansion/-/brace-expansion-1.1.12.tgz

Path to dependency file: /package.json

Path to vulnerable library: /package.json

Dependency Hierarchy:

• recursive-readdir-2.2.3.tgz (Root Library)
  • minimatch-3.1.2.tgz
    • ❌ brace-expansion-1.1.12.tgz (Vulnerable Library)

Found in base branch: csl

Vulnerability Details

brace-expansion through 5.0.6 is vulnerable to denial of service. The expand() function exhibits exponential-time complexity in the number of consecutive non-expanding '{}' brace groups. An attacker who passes a crafted string to expand(), directly or transitively, can cause significant CPU consumption and event-loop blocking. The max option does not mitigate this, as it bounds the output size rather than the recursion work.

Publish Date: 2026-06-30

URL: CVE-2026-13149

CVSS 3 Score Details (7.5)

Base Score Metrics:

• Exploitability Metrics:
  • Attack Vector: Network
  • Attack Complexity: Low
  • 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: 2026-06-30

Fix Resolution: brace-expansion - 5.0.7,https://github.com/juliangruber/brace-expansion.git - v5.0.7