Veille CVE

Septembre 2026

3 CVE

Critique 1 Élevée 0 Moyenne 2 Faible 0 Non évaluée 0 Exploitées (KEV) Tri : plus récentes « mruby » ✕
  1. CVE-2026-55107 10.0 Critique

    elct9620 kobako

    Kobako is a Ruby gem that embeds a Wasm-isolated mruby interpreter inside applications, allowing execution of untrusted Ruby scripts (LLM-generated code, user formulas, student submissions, third-party plugins) in-process without giving them access to host memory, files, network, or credentials. From version 0.1.0 to before version 0.9.1, a guest mruby script running inside the Kobako sandbox can execute arbitrary Ruby in the host process, fully escaping the sandbox. This issue has been patched in version 0.9.1.

  2. CVE-2026-79590 6.5 Moyenne

    A NULL pointer dereference vulnerability exists in the Prism parser component of mruby 4.0.0. An attacker can provide a specially crafted Ruby source file that triggers the parser to pass a NULL pointer to nonnull string handling functions, resulting in undefined behavior and application crash.

  3. CVE-2026-86547 6.2 Moyenne

    mrubyc

    mrubyc through 4.0.0 contains a null pointer dereference vulnerability in the op_enter() handler in src/vm.c when processing untrusted bytecode. Attackers can craft malicious .mrb bytecode files with OP_ENTER instructions at the top level to crash the embedding application and cause denial of service.