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Zafiyetler / CVE-2026-55107

kritik

CVE-2026-55107

kobako Sandbox Escape - guest eval reaches host RCE via method_missing → public_send (any bound Service)

Yayın Değişiklik CWE 94, 470
En geç 24 Eki 2026, 07:11 UTC tarihinden beri Trivy database'indeO derlemeden önce ne zaman girdiği kayıtlı değil.

Kaynağa göre önem derecesi

GHSA10.0CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

Trivy'nin kendi etiketi CRITICAL. Kritik diyenler: GHSA, Ruby Advisory DB.

Açıklama

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.

Etkilenen paketler ve düzeltilmiş sürümler

KaynakPaketDüzeltildiği sürüm
rubygems::GitHub Security Advisory RubyGemskobako0.9.1
rubygems::Ruby Advisory Databasekobako>= 0.9.1

Referanslar

11 referansın hepsi

Vulnerability data compiled from the Trivy vulnerability database (trivy-db, Aqua Security, Apache License 2.0), which aggregates third-party advisories. CVE records are published by The MITRE Corporation under the CVE Terms of Use; CVE is a trademark of MITRE. This product uses data from the NVD API but is not endorsed or certified by the NVD. Severity, titles and advisory data from the GitHub Advisory Database (CC BY 4.0), Red Hat security data (CC BY 4.0) and the other sources linked on each entry. Entries may be summarised or re-formatted; the linked original is the authoritative record.