CVE-2026-44009: Sandbox Array Prototype Setter Leak
Appending to an array with `$ARR[$ARR.length] = $VAL` invokes [[Set]], which traverses the prototype chain. If Array.prototype[N] has an attacker-installed setter (e.g., from sandbox/cross-realm code), that setter receives the appended value — potentially including sensitive internal state — before the caller regains control. Use Reflect.defineProperty or Ob
JSgreprules fetch cve-2026-44009-sandbox-array-prototype-setter-leak --engine opengrepDescription
Appending to an array with `$ARR[$ARR.length] = $VAL` invokes [[Set]], which traverses the prototype chain. If Array.prototype[N] has an attacker-installed setter (e.g., from sandbox/cross-realm code), that setter receives the appended value — potentially including sensitive internal state — before the caller regains control. Use Reflect.defineProperty or Ob
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