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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Affected Vendors & Products
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History
Thu, 28 May 2026 20:30:00 +0000
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ssvc
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Thu, 28 May 2026 19:30:00 +0000
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Nyariv
Nyariv sandboxjs |
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| CPEs | cpe:2.3:a:nyariv:sandboxjs:*:*:*:*:*:node.js:*:* | |
| Vendors & Products |
Nyariv
Nyariv sandboxjs |
Thu, 28 May 2026 18:00:00 +0000
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| 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 | |
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| Metrics |
cvssV3_1
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Status: PUBLISHED
Assigner: GitHub_M
Published: 2026-05-28T17:50:31.581Z
Updated: 2026-05-28T19:32:45.499Z
Reserved: 2026-05-04T16:11:33.085Z
Link: CVE-2026-43898
Updated: 2026-05-28T19:32:24.571Z
Status : Modified
Published: 2026-05-28T18:16:32.837
Modified: 2026-05-28T20:16:23.810
Link: CVE-2026-43898
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