Detections
Analytics
CVE-2026-43898
critical
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.
References
https://github.com/nyariv/SandboxJS/security/advisories/GHSA-g8f2-4f4f-5jqw
https://github.com/nyariv/SandboxJS/commit/826865251232611ec94078bab5a18ec875dad4a5