CVE-2026-43898
SandboxJS is a JavaScript sandboxing library. Prior to 0.9.6, sandbox-defined functions expose Function.caller, allowing sandboxed code to recover the internal LispType.Call runtime callback. That callback can then be invoked with attacker-controlled fake context and obj values to extract blocked host statics, recover the real host Function constructor, and execute arbitrary host JavaScript. This vulnerability is fixed in 0.9.6.
Ver en NVDAnálisis
SandboxJS versions prior to 0.9.6 are vulnerable to a full sandbox escape. Attackers can leverage the Function.caller property to bypass security boundaries and execute arbitrary JavaScript code on the host system.
Severidad
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:HCWE-94EPSS
Sin puntaje EPSS aún (CVE muy reciente).
Afecta
nyariv:sandboxjsDescripción técnica
SandboxJS is a JavaScript sandboxing library. Prior to 0.9.6, sandbox-defined functions expose Function.caller, allowing sandboxed code to recover the internal LispType.Call runtime callback. That callback can then be invoked with attacker-controlled fake context and obj values to extract blocked host statics, recover the real host Function constructor, and execute arbitrary host JavaScript. This vulnerability is fixed in 0.9.6.