{"id":"CVE-2026-59866","sourceIdentifier":"security-advisories@github.com","published":"2026-07-16T16:19:15.493","lastModified":"2026-10-24T20:10:00.137","vulnStatus":"Deferred","cveTags":[],"descriptions":[{"lang":"en","value":"Kiota is an OpenAPI based HTTP Client code generator. Prior to 1.29.1 and 1.32.5, Kiota emitted x-ms-kiota-info clientClassName and clientNamespaceName values without identifier or path sanitization as both generated client class or namespace names and generated output path components when `kiota generate` ran without -c/--class-name, allowing an attacker-controlled or compromised OpenAPI description to write generated source outside the -o output directory and inject arbitrary text into generated class or namespace declarations. This issue is fixed in version 1.29.1 and 1.32.5 by GenerationConfiguration.SanitizeClientClassName and SanitizeClientNamespaceName."},{"lang":"es","value":"Kiota es un generador de código de cliente HTTP basado en OpenAPI. Antes de la versión 1.32.5, Kiota emitía valores x-ms-kiota-info clientClassName y clientNamespaceName sin saneamiento de identificadores o rutas, tanto como nombres de clase o espacio de nombres de cliente generados como componentes de ruta de salida generados, cuando kiota generate se ejecutaba sin -c/--class-name, permitiendo que una descripción OpenAPI controlada por un atacante o comprometida escribiera código fuente generado fuera del directorio de salida -o e inyectara texto arbitrario en las declaraciones de clase o espacio de nombres generadas. Este problema se solucionó en la versión 1.32.5 mediante GenerationConfiguration.SanitizeClientClassName y SanitizeClientNamespaceName."}],"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":{"cvssMetricV40":[{"source":"security-advisories@github.com","type":"Secondary","cvssData":{"version":"4.0","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","baseScore":9.3,"baseSeverity":"CRITICAL","attackVector":"NETWORK","attackComplexity":"LOW","attackRequirements":"NONE","privilegesRequired":"NONE","userInteraction":"NONE","vulnConfidentialityImpact":"HIGH","vulnIntegrityImpact":"HIGH","vulnAvailabilityImpact":"HIGH","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","subAvailabilityImpact":"NONE","exploitMaturity":"NOT_DEFINED","confidentialityRequirement":"NOT_DEFINED","integrityRequirement":"NOT_DEFINED","availabilityRequirement":"NOT_DEFINED","modifiedAttackVector":"NOT_DEFINED","modifiedAttackComplexity":"NOT_DEFINED","modifiedAttackRequirements":"NOT_DEFINED","modifiedPrivilegesRequired":"NOT_DEFINED","modifiedUserInteraction":"NOT_DEFINED","modifiedVulnConfidentialityImpact":"NOT_DEFINED","modifiedVulnIntegrityImpact":"NOT_DEFINED","modifiedVulnAvailabilityImpact":"NOT_DEFINED","modifiedSubConfidentialityImpact":"NOT_DEFINED","modifiedSubIntegrityImpact":"NOT_DEFINED","modifiedSubAvailabilityImpact":"NOT_DEFINED","Safety":"NOT_DEFINED","Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","valueDensity":"NOT_DEFINED","vulnerabilityResponseEffort":"NOT_DEFINED","providerUrgency":"NOT_DEFINED"}}],"ssvcV203":[{"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","ssvcData":{"timestamp":"2026-07-17T03:56:40.596267Z","id":"CVE-2026-59866","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-22"},{"lang":"en","value":"CWE-94"}]}],"references":[{"url":"https://github.com/microsoft/kiota/commit/dc812dbbf88ef7edf53a890d36b2f9d1460e947d","source":"security-advisories@github.com"},{"url":"https://github.com/microsoft/kiota/pull/7884","source":"security-advisories@github.com"},{"url":"https://github.com/microsoft/kiota/releases/tag/v1.32.5","source":"security-advisories@github.com"},{"url":"https://github.com/microsoft/kiota/security/advisories/GHSA-4vv7-jj25-4gh6","source":"security-advisories@github.com"}]}