{"id":"CVE-2026-59861","sourceIdentifier":"security-advisories@github.com","published":"2026-07-16T15:16:35.440","lastModified":"2026-10-24T21:10:00.130","vulnStatus":"Deferred","cveTags":[],"descriptions":[{"lang":"en","value":"Kiota is an OpenAPI based HTTP Client code generator. Prior to 1.29.1 and 1.32.0, Kiota's Ruby generator embedded OpenAPI default fields, property names, and other schema-derived strings through CodeMethodWriter.cs and SanitizeForQuotedLiteral() in Writers/StringExtensions.cs into Ruby double-quoted literals without escaping #, allowing attacker-controlled #{expr}, #$var, or #@var interpolation markers to inject arbitrary Ruby code into generated model classes. This issue is fixed in version 1.29.1 and 1.32.0."},{"lang":"es","value":"Kiota es un generador de código de cliente HTTP basado en OpenAPI. Antes de la versión 1.32.0, el generador Ruby de Kiota incrustaba campos predeterminados de OpenAPI, nombres de propiedades y otras cadenas derivadas del esquema a través de CodeMethodWriter.cs y SanitizeForQuotedLiteral() en Writers/StringExtensions.cs en literales de Ruby entre comillas dobles sin escapar #, permitiendo que los marcadores de interpolación #{expr}, #$var o #@var controlados por el atacante inyectaran código Ruby arbitrario en las clases de modelo generadas. Este problema se corrigió en la versión 1.32.0."}],"affected":[{"source":"security-advisories@github.com","affectedData":[{"vendor":"microsoft","product":"kiota","versions":[{"version":">= 1.30.0, < 1.31.1","status":"affected"},{"version":"< 1.29.1","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:U/C:N/I:N/A:H","baseScore":7.5,"baseSeverity":"HIGH","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"HIGH"},"exploitabilityScore":3.9,"impactScore":3.6}],"ssvcV203":[{"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","ssvcData":{"timestamp":"2026-07-17T03:56:35.781411Z","id":"CVE-2026-59861","options":[{"exploitation":"none"},{"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"}]}],"references":[{"url":"https://github.com/microsoft/kiota/commit/fee1b648bb4394ba7ba72de9c0ce4f2a0bad0cb6","source":"security-advisories@github.com"},{"url":"https://github.com/microsoft/kiota/pull/7746","source":"security-advisories@github.com"},{"url":"https://github.com/microsoft/kiota/releases/tag/v1.32.0","source":"security-advisories@github.com"},{"url":"https://github.com/microsoft/kiota/security/advisories/GHSA-xg2h-5xr2-29jw","source":"security-advisories@github.com"}]}