{"resultsPerPage":1,"startIndex":0,"totalResults":1,"format":"NVD_CVE","version":"2.0","timestamp":"2026-11-09T09:57:13.670","vulnerabilities":[{"cve":{"id":"CVE-2026-55107","sourceIdentifier":"security-advisories@github.com","published":"2026-09-30T18:18:37.550","lastModified":"2026-09-30T20:17:32.923","vulnStatus":"Deferred","cveTags":[],"descriptions":[{"lang":"en","value":"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."}],"affected":[{"source":"security-advisories@github.com","affectedData":[{"vendor":"elct9620","product":"kobako","versions":[{"version":">= 0.1.0, < 0.9.1","status":"affected"}]}]}],"metrics":{"cvssMetricV31":[{"source":"security-advisories@github.com","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H","baseScore":10.0,"baseSeverity":"CRITICAL","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"CHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH"},"exploitabilityScore":3.9,"impactScore":6.0}],"ssvcV203":[{"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","ssvcData":{"timestamp":"2026-09-30T19:48:55.982496Z","id":"CVE-2026-55107","options":[{"exploitation":"poc"},{"automatable":"yes"},{"technicalImpact":"total"}],"role":"CISA Coordinator","version":"2.0.3"}}]},"weaknesses":[{"source":"security-advisories@github.com","type":"Secondary","description":[{"lang":"en","value":"CWE-94"},{"lang":"en","value":"CWE-470"}]}],"references":[{"url":"https://github.com/elct9620/kobako/commit/64f84700c81f44902bed9211318d5362f44987b3","source":"security-advisories@github.com"},{"url":"https://github.com/elct9620/kobako/releases/tag/v0.9.1","source":"security-advisories@github.com"},{"url":"https://github.com/elct9620/kobako/security/advisories/GHSA-7pwq-q9jf-539h","source":"security-advisories@github.com"},{"url":"https://github.com/elct9620/kobako/security/advisories/GHSA-7pwq-q9jf-539h","source":"134c704f-9b21-4f2e-91b3-4a467353bcc0"}]}}]}