# CVE-2026-25547: Uncontrolled Resource Consumption in @isaacs/brace-expansion

> CVE-2026-25547: Uncontrolled Resource Consumption in @isaacs/brace-expansion. CVSS 9.2 (CVSS 4.0).

Canonical: https://rewindex.com/cve/CVE-2026-25547
Last updated: 2026-06-17T10:24:50Z

- Published: 2026-02-04 21:51 UTC · Updated: 2026-06-17 10:24 UTC · Assigner: GitHub\_M
- CVSS: 9.2 (CVSS 4.0) · Severity: Critical
- EPSS: 0.55%, 46th percentile (scored 2026-10-25)
- CISA KEV: no
- CWE: CWE-1333

## 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 vendors and products

- isaacs: brace-expansion

## Tracked companies

- [Jira](https://rewindex.com/company/jira.md)

## References

- [CVE record on cve.org](https://www.cve.org/CVERecord?id=CVE-2026-25547)
- [NVD entry](https://nvd.nist.gov/vuln/detail/CVE-2026-25547)
- [https://github.com/isaacs/brace-expansion/security/advisories/GHSA-7h2j-956f-4vf2](https://github.com/isaacs/brace-expansion/security/advisories/GHSA-7h2j-956f-4vf2)

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_Sources: CVE records from the CVE Program (cve.org). CVE® is a registered trademark of The MITRE Corporation. (https://www.cve.org/) This product uses data from the NVD API but is not endorsed or certified by the NVD. (https://nvd.nist.gov/) Known Exploited Vulnerabilities catalog from CISA. (https://www.cisa.gov/known-exploited-vulnerabilities-catalog) EPSS scores from FIRST (Exploit Prediction Scoring System). (https://www.first.org/epss/)_


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Canonical: https://rewindex.com/cve/CVE-2026-25547 · Markdown: https://rewindex.com/cve/CVE-2026-25547.md · JSON: https://rewindex.com/api/v1/cves/CVE-2026-25547 · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-10-26T03:11:02.150Z