CVE-2026-34211 — SandboxJS: Stack overflow DoS via deeply nested expressions in recursive descent parser
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 ca…
Published: 2026-04-06 · CVSS: 6.9 · CVSS 4.0
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.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7