CVE-2026-34211

SandboxJS is a JavaScript sandboxing library. Prior to 0.8.36, the @nyariv/sandboxjs parser contains unbounded recursion in the restOfExp function and the lispify/lispifyExpr call chain. An attacker can crash any Node.js process that parses untrusted input by supplying deeply nested expressions (e.g., ~2000 nested parentheses), causing a RangeError: Maximum call stack size exceeded that terminates the process. This vulnerability is fixed in 0.8.36.

CVSS v3 7.5 HIGH

7.5^/10

CVSS v3 : HIGH

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://github.com/nyariv/SandboxJS/security/advisories/GHSA-8pfc-jjgw-6g26	Exploit Mitigation Vendor Advisory

Configurations

Configuration 1 (hide)

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

History

09 Apr 2026, 18:05

Type	Values Removed	Values Added
References	~~() https://github.com/nyariv/SandboxJS/security/advisories/GHSA-8pfc-jjgw-6g26 -~~	() https://github.com/nyariv/SandboxJS/security/advisories/GHSA-8pfc-jjgw-6g26 - Exploit, Mitigation, Vendor Advisory
CPE		cpe:2.3:a:nyariv:sandboxjs::::::node.js::*
First Time		Nyariv sandboxjs Nyariv

07 Apr 2026, 15:17

Type	Values Removed	Values Added
CVSS	v2 : ~~unknown~~ v3 : ~~unknown~~	v2 : unknown v3 : 7.5

06 Apr 2026, 16:16

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-04-06 16:16

Updated : 2026-04-09 18:05

NVD link : CVE-2026-34211

Mitre link : CVE-2026-34211

CVE.ORG link : CVE-2026-34211

JSON object : View

Products Affected

nyariv

sandboxjs

CWE

CWE-674

Uncontrolled Recursion

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