Uncontrolled Recursion Affecting @nyariv/sandboxjs package, versions <0.8.36
Threat Intelligence
Exploit Maturity
Snyk has a proof-of-concept or detailed explanation of how to exploit this vulnerability.
Proof of Concept
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- published5 Apr 2026
- disclosed3 Apr 2026
- creditoffset
Introduced: 3 Apr 2026
NewCVE-2026-34211 (opens in a new tab)Common Vulnerabilities and Exposures (CVE) are common identifiers for publicly known security vulnerabilities
Common Weakness Enumeration (CWE) is a category system for software weaknesses
How to fix?
Upgrade @nyariv/sandboxjs to version 0.8.36 or higher.
Overview
@nyariv/sandboxjs is a Javascript sandboxing library.
Affected versions of this package are vulnerable to Uncontrolled Recursion via the restOfExp function and the recursive call chain involving lispify and lispifyExpr. An attacker can cause the process to crash by supplying deeply nested expressions that trigger unbounded recursion.