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.
Advisories
| Source | ID | Title |
|---|---|---|
Github GHSA |
GHSA-g8f2-4f4f-5jqw | SandboxJS has a sandbox escape via Function.caller leakage of internal call op |
Fixes
Solution
No solution given by the vendor.
Workaround
No workaround given by the vendor.
References
History
Thu, 28 May 2026 19:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| First Time appeared |
Nyariv
Nyariv sandboxjs |
|
| CPEs | cpe:2.3:a:nyariv:sandboxjs:*:*:*:*:*:node.js:*:* | |
| Vendors & Products |
Nyariv
Nyariv sandboxjs |
Thu, 28 May 2026 18:00:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| 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. | |
| Title | SandboxJS: Sandbox escape via Function.caller leakage of internal call op | |
| Weaknesses | CWE-94 | |
| References |
| |
| Metrics |
cvssV3_1
|
Projects
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Status: PUBLISHED
Assigner: GitHub_M
Published:
Updated: 2026-05-28T19:32:45.499Z
Reserved: 2026-05-04T16:11:33.085Z
Link: CVE-2026-43898
No data.
Status : Analyzed
Published: 2026-05-28T18:16:32.837
Modified: 2026-05-28T19:24:15.530
Link: CVE-2026-43898
No data.
OpenCVE Enrichment
Updated: 2026-05-28T19:30:16Z
Weaknesses
Github GHSA