---
cve: "CVE-2026-25547"
severity: "CRITICAL"
cvss: 9.2
epss: "48%"
vendor: "isaacs"
kev: false
exploited: false
published: "2026-02-04 22:16:00"
tags: [cve, security, critical]
source: tsecurity.de CVE-Dossier
exported: "2026-09-08T10:56:12+02:00"
---

# CVE-2026-25547

> 9.2 CRITICAL · 🧪 PoC

## Beschreibung

@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.

## CVSS-Vektor

```
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
```

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Netzwerk | bad |
| AC Komplexität | Gering | bad |
| PR Privilegien | Keine | bad |
| UI Interaktion | Keine | bad |

## Patch verfügbar (OSV)

- dc20357ee74ab18df00d596573764428ede66b3d (Commit)

## Referenzen

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

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-25547) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_