---
cve: "CVE-2026-25587"
severity: "CRITICAL"
cvss: 10.0
epss: "65%"
vendor: "nyariv"
kev: false
exploited: false
published: "2026-02-06 20:16:10"
tags: [cve, security, critical]
source: tsecurity.de CVE-Dossier
exported: "2026-09-15T10:27:27+02:00"
---

# CVE-2026-25587

> 10.0 CRITICAL · 🧪 PoC

## Beschreibung

SandboxJS is a JavaScript sandboxing library. Prior to 0.8.29, as Map is in SAFE_PROTOYPES, it's prototype can be obtained via Map.prototype. By overwriting Map.prototype.has the sandbox can be escaped. This vulnerability is fixed in 0.8.29.

## CVSS-Vektor

```
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
```

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Netzwerk | bad |
| AC Komplexität | Gering | bad |
| PR Privilegien | Keine | bad |
| UI Interaktion | Keine | bad |
| S Scope | Verändert | bad |
| C Vertraulichkeit | Hoch | bad |
| I Integrität | Hoch | bad |
| A Verfügbarkeit | Hoch | bad |

## Patch verfügbar (OSV)

- 67cb186c41c78c51464f70405504e8ef0a6e43c3 (Commit)

## Referenzen

- <https://github.com/nyariv/SandboxJS/security/advisories/GHSA-66h4-qj4x-38xp>
- <https://github.com/nyariv/SandboxJS/commit/67cb186c41c78c51464f70405504e8ef0a6e43c3>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-25587) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_