Uncontrolled Resource Consumption in @isaacs/brace-expansion_CVE-2026-25547

9.2 / 10

CRITICAL

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

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.

Basic Information

ID CVE-2026-25547

Source GitHub_M

Published Feb 4, 2026 at 21:51

Affected Product

Vendor isaacs

Product brace-expansion

Version < 5.0.1

Affected Versions isaacs brace-expansion < 5.0.1

CWE Classification

CWE-1333

References

github.com /isaacs/brace-expansion/security/advisories/GHSA-7h2j-956f-4vf2

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