CVE-2026-34211 Details
Description
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.
A denial-of-service vulnerability has been identified in the @nyariv/sandboxjs library, prior to version 0.8.36. The issue arises from unbounded recursion in the expression parsing functions, which can be exploited by supplying deeply nested expressions, such as approximately 2000 nested parentheses. This leads to a RangeError: Maximum call stack size exceeded, causing the Node.js process to crash. The vulnerability is particularly impactful because SandboxJS is designed to safely execute untrusted JavaScript, making it vulnerable in its intended use case.
Users are advised to update to @nyariv/sandboxjs version 0.8.36 or later, where this vulnerability has been fixed.
Metrics
CVSS 4.0 Severity and Vector Strings:
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed Apr 7, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/nyariv/SandboxJS/security/advisories/GHSA-8pfc-jjgw-6g26 | [email protected] | ExploitMitigationVendor Advisory |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-674 | Uncontrolled Recursion | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| nyariv sandboxjs | < 0.8.36 |
CPE
Remediation
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Change History
5 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | [email protected] |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| Apr 9, 2026 | Initial Analysis | [email protected] |
| Apr 7, 2026 | CVE Modified | CISA-ADP |
| Apr 6, 2026 | New CVE Received | [email protected] |