CVE-2026-34217

SandboxJS is a JavaScript sandboxing library. Prior to 0.8.36, a scope modification vulnerability exists in @nyariv/sandboxjs. The vulnerability allows untrusted sandboxed code to leak internal interpreter objects through the new operator, exposing sandbox scope objects in the scope hierarchy to untrusted code; an unexpected and undesired exploit. While this could allow modifying scopes inside the sandbox, code evaluation remains sandboxed and prototypes remain protected throughout the execution. This vulnerability is fixed in 0.8.36.

Score
CVSS 3.1 7.2 High
Status
Analyzed - security-advisories@github.com
Published
2026-04-06
Last modified
2026-10-26
Weaknesses
CWE-668

Affected products

References

 
 
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