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CVE-2026-26954 - Vulnerability Analysis

CriticalCVSS: 10.0

Last Updated: March 13, 2026

SandboxJS - Sandbox Escape

Published: March 13, 2026Updated: March 13, 2026Remote Exploitable

Overview

SandboxJS < 0.8.34 contains a sandbox escape vulnerability caused by obtaining arrays containing Function and using Object.fromEntries to construct arbitrary properties, letting attackers escape the sandbox, exploit requires crafted input.

Severity & Score

Severity: Critical

CVSS Score: 10.0

Impact

Attackers can escape the sandbox, potentially executing arbitrary code or bypassing security restrictions.

Mitigation

Update to version 0.8.34 or later.

References

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

Related Resources

Vulnerability Intelligence Dashboard
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Details

CVE ID: CVE-2026-26954
Severity: Critical
CVSS Score: 10.0
Type: sandbox_escape
Status: new

CWE

CWE-94

CVSS Metrics

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