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    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.

    Published:Apr 6, 2026
    Last Modified:Apr 10, 2026
    EPS:Apr 6, 2026
    EPSS Score:0.0007
    CVSS Score:7.2

    Affected Products

    Vendor
    Nyariv
    Product
    Sandboxjs

    Exploits

    https://github.com/nyariv/SandboxJS/security/advisories/GHSA-hg73-4w7g-q96whttps://github.com/nyariv/SandboxJS/security/advisories/GHSA-hg73-4w7g-q96w

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

    Related CVEs

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    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High