Vulnerability · Published Jul 16, 2026 · Assigned by GitHub_M
CVE-2026-59867Kiota: Generation-time SSRF + remote/local file inclusion via unrestricted $ref
High 7.1
In plain English
A high-severity path traversal in kiota from microsoft. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 2.4% (higher than 84% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official description
Kiota is an OpenAPI based HTTP Client code generator. Prior to 1.29.1 and 1.32.5, Kiota resolved OpenAPI $ref values by fetching remote http(s) URLs and reading local absolute or out-of-tree file paths, allowing `kiota generate` on an attacker-controlled or attacker-influenced description to perform build-time SSRF, remote file inclusion, and local file inclusion by inlining external schemas such as REMOTE_KIOTA_PROP or Leaked into generated clients. This issue is fixed in version 1.29.1 and 1.32.5 by AllowedExternalOriginsStreamLoader and the --allowed-external-origins option.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| NuGet | microsoft.openapi.kiota | 1.32.5 | GHSA-rg4h-fpcp-2qm8 |
| NuGet | microsoft.openapi.kiota | 1.29.1 | GHSA-rg4h-fpcp-2qm8 |
| NuGet | microsoft.openapi.kiota.builder | 1.32.5 | GHSA-rg4h-fpcp-2qm8 |
| NuGet | microsoft.openapi.kiota.builder | 1.29.1 | GHSA-rg4h-fpcp-2qm8 |
Affected products (as reported)
Weakness: CWE-22, CWE-829, CWE-918 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:L/A:N
References
- https://github.com/microsoft/kiota/security/advisories/GHSA-rg4h-fpcp-2qm8 x_refsource_CONFIRM
- https://github.com/microsoft/kiota/pull/7888 x_refsource_MISC
- https://github.com/microsoft/kiota/commit/cccd798027f0a20db796b3df6c64f9897a39d7b1 x_refsource_MISC
- https://github.com/microsoft/kiota/releases/tag/v1.32.5 x_refsource_MISC