CVE-2026-34211

HighCVSS 7.5/10Last modified Oct 26, 2026

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.

Metrics

CVSS 3.1 7.5/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Weakness enumeration

CWE-674

Affected software

Vendor	Product	Versions
nyariv	SandboxJS	< 0.8.36

References

https://github.com/nyariv/SandboxJS/security/advisories/GHSA-8pfc-jjgw-6g26Exploit, Mitigation, Vendor Advisory

Timeline

Published: Apr 6, 2026
Last modified: Oct 26, 2026
NVD status: Analyzed

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