CVE-2026-59867 Details
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.
A vulnerability in Microsoft Kiota, an OpenAPI-based HTTP client code generator, prior to version 1.32.5, allowed for server-side request forgery (SSRF) and remote/local file inclusion. This occurred because Kiota resolved OpenAPI $ref values by fetching remote URLs or reading local file paths, inlining the referenced schemas into the generated client. As a result, an attacker could manipulate the OpenAPI description to exploit these behaviors. The vulnerability was verified in versions 1.32.3 and 1.32.4.
Upgrade to Kiota version 1.32.5 or later. The updated version includes a new 'AllowedExternalOriginsStreamLoader' that denies all external references by default. Users can now specify allowed origins or paths using the '--allowed-external-origins' parameter, which must be added to commands that load OpenAPI descriptions.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed Jul 16, 2026CISA-ADP
Assessed Jul 16, 2026References to Advisories, Solutions, and Tools
By selecting these links, you will be leaving this site. These are references gathered from the official CVE record and are not endorsed by Volerion.
| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/microsoft/kiota/commit/cccd798027f0a20db796b3df6c64f9897a39d7b1 | [email protected] | Source CodeVendor |
| https://github.com/microsoft/kiota/pull/7888 | [email protected] | Source CodeVendor |
| https://github.com/microsoft/kiota/releases/tag/v1.32.5 | [email protected] | Release NotesVendor |
| https://github.com/microsoft/kiota/security/advisories/GHSA-rg4h-fpcp-2qm8 | [email protected] | AdvisoryRemedyVendor |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-22 | Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') | [email protected] |
| CWE-829 | Inclusion of Functionality from Untrusted Control Sphere | [email protected] |
| CWE-918 | Server-Side Request Forgery (SSRF) | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| Microsoft Kiota | < 1.32.5 (semver) |
CPE
Remediation
| |
Change History
3 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Aug 17, 2026 | CVE Modified | [email protected] |
| Jul 16, 2026 | New CVE Received | [email protected] |
| Jul 16, 2026 | CVE Modified | CISA-ADP |