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Critical severityNVD Advisory· Published Feb 4, 2026· Updated Apr 15, 2026

CVE-2026-25547

CVE-2026-25547

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.

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Affected packages

Versions sourced from the GitHub Security Advisory.

PackageAffected versionsPatched versions
@isaacs/brace-expansionnpm
< 5.0.15.0.1

Affected products

147

Patches

Vulnerability mechanics

References

3

News mentions

0

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