CVE-2026-25587
Critical · 10.0CVSS
10.0
EPSS
0.7%
Published
Feb 6, 2026
CISA due date
—
The record
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.
Affected packages
| Ecosystem | Package | Introduced | Fixed |
|---|---|---|---|
| npm | @nyariv/sandboxjs | 0 | 0.8.29 |
Related vulnerabilities
- GHSA-66h4-qj4x-38xp @nyariv/sandboxjs has a Sandbox Escape vulnerability Same vulnerability
- CVE-2026-43898 SandboxJS is a JavaScript sandboxing library. Also affects @nyariv/sandboxjs
- GHSA-g8f2-4f4f-5jqw SandboxJS has a sandbox escape via Function.caller leakage of internal call op Also affects @nyariv/sandboxjs
- CVE-2026-34208 SandboxJS is a JavaScript sandboxing library. Also affects @nyariv/sandboxjs
- CVE-2026-34217 SandboxJS is a JavaScript sandboxing library. Also affects @nyariv/sandboxjs
- CVE-2026-34211 SandboxJS is a JavaScript sandboxing library. Also affects @nyariv/sandboxjs
- GHSA-hg73-4w7g-q96w SandboxJS: Sandbox Escape via Prop Object Leak in New Handler Also affects @nyariv/sandboxjs
- GHSA-8pfc-jjgw-6g26 SandboxJS: Stack overflow DoS via deeply nested expressions in recursive descent parser Also affects @nyariv/sandboxjs