CVE-2026-59866
CVE-2026-59866 updated by NVD
Summary
Kiota is an OpenAPI based HTTP Client code generator. Prior to 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 1.32.5 by GenerationConfiguration.SanitizeClientClassName and SanitizeClientNamespaceName.
Affected packages
| Ecosystem | Package | Affected versions | Fixed versions |
|---|---|---|---|
| NuGet | Microsoft.OpenApi.Kiota | — | 1.32.5 |
| NuGet | Microsoft.OpenApi.Kiota.Builder | — | 1.32.5 |
Remediation: Upgrade to 1.32.5 or later.
References
Includes data from the GitHub Advisory Database, licensed under CC-BY 4.0.
Includes data from the National Vulnerability Database (NIST). NVD data is in the public domain; this page is not endorsed by NIST.
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EPSS scores provided by the FIRST.org Exploit Prediction Scoring System.