high7.5
CVE-2026-59862
Microsoft Kiota: Code Generation Literal Injection in Kiota Python Generator
Impact
Kiota is an OpenAPI based HTTP Client code generator. Prior to 1.29.1 and 1.32.0, Kiota's Python generator let attacker-controlled enum value descriptions from x-ms-enum.values[].description flow through KiotaBuilder.SetEnumOptions into Documentation.DescriptionTemplate and PythonConventionService.RemoveInvalidDescriptionCharacters without newline sanitization, allowing generated inline comments to split and execute attacker-controlled Python code at module scope when generated modules were imported. This issue is fixed in version 1.29.1 and 1.32.0.
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| nuget | Microsoft.OpenAPI.Kiota | >= 1.30.0, < 1.32.0 | 1.32.0 |
| nuget | Microsoft.OpenAPI.Kiota.Builder | >= 1.30.0, < 1.32.0 | 1.32.0 |
| nuget | Microsoft.OpenApi.Kiota | < 1.29.1 | 1.29.1 |
| nuget | Microsoft.OpenApi.Kiota.Builder | < 1.29.1 | 1.29.1 |