CVE-2026-59866

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{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-59866", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "yes"}, {"Technical Impact": "total"}], "version": "2.0.3", "timestamp": "2026-07-17T03:56:40.596267Z"}}}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-07-29T18:23:58.959Z"}}], "cna": {"title": "Kiota: Arbitrary file write + code-injection via x-ms-kiota-info clientClassName and clientNamespaceName", "source": {"advisory": "GHSA-4vv7-jj25-4gh6", "discovery": "UNKNOWN"}, "metrics": [{"cvssV4_0": {"version": "4.0", "baseScore": 9.3, "attackVector": "NETWORK", "baseSeverity": "CRITICAL", "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", "userInteraction": "NONE", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "NONE", "subIntegrityImpact": "NONE", "vulnIntegrityImpact": "HIGH", "subAvailabilityImpact": "NONE", "vulnAvailabilityImpact": "HIGH", "subConfidentialityImpact": "NONE", "vulnConfidentialityImpact": "HIGH"}}], "affected": [{"vendor": "microsoft", "product": "kiota", "versions": [{"status": "affected", "version": ">= 1.30.0, < 1.31.1"}, {"status": "affected", "version": "< 1.29.1"}]}], "references": [{"url": "https://github.com/microsoft/kiota/security/advisories/GHSA-4vv7-jj25-4gh6", "name": "https://github.com/microsoft/kiota/security/advisories/GHSA-4vv7-jj25-4gh6", "tags": ["x_refsource_CONFIRM"]}, {"url": "https://github.com/microsoft/kiota/pull/7884", "name": "https://github.com/microsoft/kiota/pull/7884", "tags": ["x_refsource_MISC"]}, {"url": "https://github.com/microsoft/kiota/commit/dc812dbbf88ef7edf53a890d36b2f9d1460e947d", "name": "https://github.com/microsoft/kiota/commit/dc812dbbf88ef7edf53a890d36b2f9d1460e947d", "tags": ["x_refsource_MISC"]}, {"url": "https://github.com/microsoft/kiota/releases/tag/v1.32.5", "name": "https://github.com/microsoft/kiota/releases/tag/v1.32.5", "tags": ["x_refsource_MISC"]}], "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."}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-22", "description": "CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')"}]}, {"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-94", "description": "CWE-94: Improper Control of Generation of Code ('Code Injection')"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-08-17T15:03:20.823Z"}}}, "cveMetadata": {"cveId": "CVE-2026-59866", "state": "PUBLISHED", "dateUpdated": "2026-08-17T15:03:20.823Z", "dateReserved": "2026-07-07T15:41:53.607Z", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "datePublished": "2026-07-16T14:46:50.738Z", "assignerShortName": "GitHub_M"}, "dataVersion": "5.2"}

{"affected": [{"affectedData": [{"product": "kiota", "vendor": "microsoft", "versions": [{"status": "affected", "version": ">= 1.30.0, < 1.31.1"}, {"status": "affected", "version": "< 1.29.1"}]}], "source": "security-advisories@github.com"}], "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 c\u00f3digo de cliente HTTP basado en OpenAPI. Antes de la versi\u00f3n 1.32.5, Kiota emit\u00eda 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 descripci\u00f3n OpenAPI controlada por un atacante o comprometida escribiera c\u00f3digo 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 solucion\u00f3 en la versi\u00f3n 1.32.5 mediante GenerationConfiguration.SanitizeClientClassName y SanitizeClientNamespaceName."}], "id": "CVE-2026-59866", "lastModified": "2026-10-24T20:10:00.137", "metrics": {"cvssMetricV40": [{"cvssData": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "NONE", "attackVector": "NETWORK", "availabilityRequirement": "NOT_DEFINED", "baseScore": 9.3, "baseSeverity": "CRITICAL", "confidentialityRequirement": "NOT_DEFINED", "exploitMaturity": "NOT_DEFINED", "integrityRequirement": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "privilegesRequired": "NONE", "providerUrgency": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "userInteraction": "NONE", "valueDensity": "NOT_DEFINED", "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", "version": "4.0", "vulnAvailabilityImpact": "HIGH", "vulnConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "HIGH", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "source": "security-advisories@github.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-59866", "options": [{"exploitation": "none"}, {"automatable": "yes"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2026-07-17T03:56:40.596267Z", "version": "2.0.3"}}]}, "published": "2026-07-16T16:19:15.493", "references": [{"source": "security-advisories@github.com", "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"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Deferred", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-22"}, {"lang": "en", "value": "CWE-94"}], "source": "security-advisories@github.com", "type": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,1.32.5)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "kiota", "source": "cna", "vendor": "microsoft"}, "product": "kiota", "vendor": "microsoft"}], "created": "2026-07-16T16:30:02.120124+00:00", "updated": "2026-08-17T20:30:17.390955+00:00", "vendors": ["microsoft", "microsoft$PRODUCT$kiota"]}