---
cve: "CVE-2026-26954"
severity: "CRITICAL"
cvss: 10.0
epss: "55%"
vendor: "nyariv"
kev: false
exploited: false
published: "2026-03-13 19:54:31"
tags: [cve, security, critical]
source: tsecurity.de CVE-Dossier
exported: "2026-09-18T05:12:05+02:00"
---

# CVE-2026-26954

> 10.0 CRITICAL · 🧪 PoC

## Beschreibung

SandboxJS is a JavaScript sandboxing library. Prior to 0.8.34, it is possible to obtain arrays containing Function, which allows escaping the sandbox. Given an array containing Function, and Object.fromEntries, it is possible to construct {[p]: Function} where p is any constructible property. This vulnerability is fixed in 0.8.34.

## 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)

- 584f8ae960b4fcfc18feb833c8c6b49157874ccd (Commit)

## Referenzen

- <https://github.com/nyariv/SandboxJS/security/advisories/GHSA-6r9f-759j-hjgv>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-26954) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_