# CVE-2026-25547

## Summary

- **CVE ID:** CVE-2026-25547
- **Severity:** CRITICAL
- **CVSS Score:** 9.2 (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)
- **CWE:** CWE-1333
- **Published:** Feb 3, 2026
- **Last Modified:** Feb 5, 2026

## 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.

## Affected Products

- isaacs — brace-expansion (< 5.0.1)
- npm — @isaacs/brace-expansion (<= 5.0.0)

## References

- [CNA](https://github.com/isaacs/brace-expansion/security/advisories/GHSA-7h2j-956f-4vf2)
- [GitHub](https://github.com/advisories/GHSA-7h2j-956f-4vf2)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.50%
- **EPSS Percentile:** 41.2

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-11._