CVE-2026-43898
SandboxJS is a JavaScript sandboxing library. Prior to 0.9.6, sandbox-defined functions expose Function.caller, allowing
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.
CRITICAL · CVSS 10
EPSS 0.00061
Schedule remediation
- CVSS base score ≥ 7.0
Sigma rules0
YARA rules0