high7.1
CVE-2026-59867
Microsoft Kiota: Generation-time SSRF + remote/local file inclusion via unrestricted $ref
Impact
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
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| nuget | Microsoft.OpenApi.Kiota | >= 1.30.0, < 1.32.5 | 1.32.5 |
| nuget | Microsoft.OpenApi.Kiota.Builder | >= 1.30.0, < 1.32.5 | 1.32.5 |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://github.com/advisories/GHSA-rg4h-fpcp-2qm8
- https://github.com/microsoft/kiota/security/advisories/GHSA-rg4h-fpcp-2qm8
- https://nvd.nist.gov/vuln/detail/CVE-2026-59867
- https://github.com/microsoft/kiota/pull/7888
- https://github.com/microsoft/kiota/commit/cccd798027f0a20db796b3df6c64f9897a39d7b1
- https://github.com/microsoft/kiota/releases/tag/v1.32.5