PT-2026-60491 · Microsoft · Kiota

CVE-2026-59866 · Published 2026-07-16 · Updated 2026-07-16

NVD

CVSS v4.0

9.3

Critical

Base vector

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

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.

Fix

Path traversal

Code Injection

Weakness Enumeration

CWE-22

CWE-94

Related Identifiers

CVE-2026-59866

Affected Products

Kiota

References · 5

• https://nvd.nist.gov/vuln/detail/CVE-2026-59866 · Security Note
• https://github.com/microsoft/kiota/security/advisories/GHSA-4vv7-jj25-4gh6 · Note
• https://github.com/microsoft/kiota/pull/7884 · Note
• https://github.com/microsoft/kiota/releases/tag/v1.32.5 · Note
• https://github.com/microsoft/kiota/commit/dc812dbbf88ef7edf53a890d36b2f9d1460e947d · Note