CVE-2026-26954
SandboxJS has a Sandbox Escape
CVSS Score
10.0
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-94 |
| Vendor | nyariv |
| Product | sandboxjs |
| Published | Mar 13, 2026 |
| Last Updated | Mar 16, 2026 |
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CVSS v3 Breakdown
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
Affected Versions
nyariv / SandboxJS
< 0.8.34