CVE-2026-26954 SandboxJS has a Sandbox Escape

SandboxJS is a JavaScript sandboxing library. Prior to 0.8.34, it is possible to obtain arrays containing Function, which allows escaping the sandbox. Given an array containing Function, and Object.fromEntries, it is possible to construct p: Function where p is any constructible property. This...

CVE-2026-26954: Improper Control of Generation of Code

SandboxJS is a JavaScript sandboxing library. Prior to 0.8.34, it is possible to obtain arrays containing Function, which allows escaping the sandbox. Given an array containing Function, and Object.fromEntries, it is possible to construct p: Function where p is any constructible property. This...

Prototype Pollution in silentmatt/expr-eval

✍️ Description With speficific input attckers can define properties on prototype, which will lead to prototype pollution. Need node version=12.0.0, which introduce Object.fromEntries 🕵️‍♂️ Proof of Concept // PoC.js const Parser = require'expr-eval'; const o = ; console.log"o.a=", o.a; // o.a=...