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CVE-2026-34211

6.9 medium SSVC exploitation: poc Analyzed
NVD · CVE.org

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.

Fix

Patch, vendor advisory and mitigation references on NVD 1

Every line above is quoted from NVD, CISA, Microsoft, the vendor's own advisory or DISA; nothing is generated.

Change history 1

  1. First seenCVSS 6.9 · nyarivNVD modified 2026-10-26 22:10

Affected (CPE criteria) 1

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

References 1