@isaacs/brace-expansion is a hybrid CJS/ESM TypeScript fork of brace-expansion. Prior to version 5.0.1, @isaacs/brace-expansion is vulnerable to a denial of service (DoS) issue caused by unbounded brace range expansion. When an attacker provides a pattern containing repeated numeric brace ranges, the library attempts to eagerly generate every possible combination synchronously. Because the expansion grows exponentially, even a small input can consume excessive CPU and memory and may crash the Node.js process. This issue has been patched in version 5.0.1.
Advisories
Source ID Title
Github GHSA Github GHSA GHSA-7h2j-956f-4vf2 @isaacs/brace-expansion has Uncontrolled Resource Consumption
Fixes

Solution

No solution given by the vendor.


Workaround

No workaround given by the vendor.

History

Sat, 07 Feb 2026 00:15:00 +0000

Type Values Removed Values Added
Weaknesses CWE-409
References
Metrics threat_severity

None

cvssV3_1

{'score': 6.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H'}

threat_severity

Moderate


Thu, 05 Feb 2026 15:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Thu, 05 Feb 2026 11:45:00 +0000

Type Values Removed Values Added
First Time appeared Isaacs
Isaacs brace-expansion
Vendors & Products Isaacs
Isaacs brace-expansion

Wed, 04 Feb 2026 22:00:00 +0000

Type Values Removed Values Added
Description @isaacs/brace-expansion is a hybrid CJS/ESM TypeScript fork of brace-expansion. Prior to version 5.0.1, @isaacs/brace-expansion is vulnerable to a denial of service (DoS) issue caused by unbounded brace range expansion. When an attacker provides a pattern containing repeated numeric brace ranges, the library attempts to eagerly generate every possible combination synchronously. Because the expansion grows exponentially, even a small input can consume excessive CPU and memory and may crash the Node.js process. This issue has been patched in version 5.0.1.
Title Uncontrolled Resource Consumption in @isaacs/brace-expansion
Weaknesses CWE-1333
References
Metrics cvssV4_0

{'score': 9.2, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:H'}


Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2026-02-05T14:31:38.349Z

Reserved: 2026-02-02T19:59:47.376Z

Link: CVE-2026-25547

cve-icon Vulnrichment

Updated: 2026-02-05T14:24:51.376Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-02-04T22:16:00.813

Modified: 2026-02-05T14:57:20.563

Link: CVE-2026-25547

cve-icon Redhat

Severity : Moderate

Publid Date: 2026-02-04T21:51:17Z

Links: CVE-2026-25547 - Bugzilla

cve-icon OpenCVE Enrichment

Updated: 2026-02-05T11:39:44Z

Weaknesses