CVE-2026-25587

CRITICAL
2026-02-06 [email protected] GHSA-66h4-qj4x-38xp
10.0
CVSS 3.1
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CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Changed
Confidentiality
High
Integrity
High
Availability
High

Lifecycle Timeline

4
Analysis Generated
Mar 12, 2026 - 21:54 vuln.today
PoC Detected
Feb 18, 2026 - 14:31 vuln.today
Public exploit code
Patch Released
Feb 18, 2026 - 14:31 nvd
Patch available
CVE Published
Feb 06, 2026 - 20:16 nvd
CRITICAL 10.0

Tags

Code Injection RCE Sandboxjs

Description

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.

Analysis

SandboxJS has a fourth CVSS 10.0 sandbox escape through Map's safe prototype being used as a gateway to inject arbitrary code.

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Remediation

Within 24 hours: Identify all systems and applications using SandboxJS and assess their exposure to untrusted code sources. Within 7 days: Upgrade SandboxJS to version 0.8.29 or later across all affected systems and validate the patch in staging environments. …

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Priority Score

70
Low Medium High Critical
KEV: 0
EPSS: +0.0
CVSS: +50
POC: +20

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CVE-2026-25587 vulnerability details – vuln.today
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