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.

CVSS v3 7.2 HIGH

7.2^/10

CVSS v3 : HIGH

Vector :

Exploitability : 3.9 / Impact : 2.7

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact LOW

Integrity Impact LOW

Availability Impact NONE

Scope CHANGED

References

Link	Resource
https://github.com/nyariv/SandboxJS/security/advisories/GHSA-hg73-4w7g-q96w	Exploit Mitigation Vendor Advisory
https://github.com/nyariv/SandboxJS/security/advisories/GHSA-hg73-4w7g-q96w	Exploit Mitigation Vendor Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:nyariv:sandboxjs:*:*:*:*:*:node.js:*:*

History

09 Apr 2026, 18:03

Type	Values Removed	Values Added
References	~~() https://github.com/nyariv/SandboxJS/security/advisories/GHSA-hg73-4w7g-q96w -~~	() https://github.com/nyariv/SandboxJS/security/advisories/GHSA-hg73-4w7g-q96w - Exploit, Mitigation, Vendor Advisory
CVSS	v2 : ~~unknown~~ v3 : ~~unknown~~	v2 : unknown v3 : 7.2
First Time		Nyariv sandboxjs Nyariv
CPE		cpe:2.3:a:nyariv:sandboxjs::::::node.js::*

06 Apr 2026, 16:16

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-04-06 16:16

Updated : 2026-04-09 18:03

NVD link : CVE-2026-34217

Mitre link : CVE-2026-34217

CVE.ORG link : CVE-2026-34217

JSON object : View

Products Affected

nyariv

sandboxjs

CWE

CWE-668

Exposure of Resource to Wrong Sphere

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