@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.
History

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'}


cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published: 2026-02-04T21:51:17.198Z

Updated: 2026-02-04T21:51:17.198Z

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

Link: CVE-2026-25547

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

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

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

Link: CVE-2026-25547

cve-icon Redhat

No data.