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CVE-2026-43898

SandboxJS: Sandbox escape via Function.caller leakage of internal call op PUBLISHED

Description (CNA)

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.

Affected (CNA)

Vendor / productVersions
nyariv / SandboxJSaffected < 0.9.6

CWE

CWE-94

References

ADP enrichment

CISA-ADP

No English description supplied.