CVE-2026-25142
Critical
Description
SandboxJS is a JavaScript sandboxing library. Prior to 0.8.27, SanboxJS does not properly restrict __lookupGetter__ which can be used to obtain prototypes, which can be used for escaping the sandbox / remote code execution. This vulnerability is fixed in 0.8.27.
SeverityCritical
CVSS10.0
Exploit probability—
ProductNyariv Sandboxjs
PublishedFeb 2, 2026
First seenFeb 2, 2026
Weakness typeCWE-94Code injection
How to fix
Update
- nyariv sandboxjs0.8.27 or later
- @nyariv/sandboxjs0.8.27 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| nyariv sandboxjs | v < 0.8.27 | 0.8.27 |
| @nyariv/sandboxjsnpm | v < 0.8.27 | 0.8.27 |
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