CVE-2026-25520 — SandboxJS has a Sandbox Escape
SandboxJS is a JavaScript sandboxing library. Prior to 0.8.29, The return values of functions aren't wrapped. Object.values/Object.entries can be used to get an Array containing…
Published: 2026-02-06 · CVSS: 10.0 · CVSS 3.1
SandboxJS is a JavaScript sandboxing library. Prior to 0.8.29, The return values of functions aren't wrapped. Object.values/Object.entries can be used to get an Array containing the host's Function constructor, by using Array.prototype.at you can obtain the hosts Function constructor, which can be used to execute arbitrary code outside of the sandbox. This vulnerability is fixed in 0.8.29.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7