CVE-2026-43898
10.0 CRITICALSandboxJS is a JavaScript sandboxing library
Published: 2026-05-28 · Last updated: 2026-05-28
Severity and scoring
- CVSS
- 10.0 CRITICAL
- Vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
- CWE
- CWE-94
Affected products
| Vendor | Product |
|---|---|
| nyariv | sandboxjs |
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.
Source: NVD
References
- [NVD]https://nvd.nist.gov/vuln/detail/CVE-2026-43898
- [Patch]https://github.com/nyariv/SandboxJS/commit/826865251232611ec94078bab5a18ec875dad4a5
- [Vendor advisory]https://github.com/nyariv/SandboxJS/security/advisories/GHSA-g8f2-4f4f-5jqw
- [Vendor advisory]https://github.com/nyariv/SandboxJS/security/advisories/GHSA-g8f2-4f4f-5jqw
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