Security Advisory

CVE-2026-43898

CVE vulnerability detail - eXtreme Datacenter Security Operations

Published 2026-05-28 17:50:31

Last updated 2026-05-28 19:32:45

Assigner GitHub_M

CVSS score 10.0

State PUBLISHED

Description

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.

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