CVE-2026-59867

Kiota: Generation-time SSRF + remote/local file inclusion via unrestricted $ref

State: Published
Severity: 7.1 High
Published: Jul 16, 2026
Updated: Aug 17, 2026
Reserved: Jul 7, 2026

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.

Scores

CVSS	Score	Vector	Source
3.1	7.1 High	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:L/A:N	GitHub_M

Weaknesses

CWE-22 Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
CWE-829 Inclusion of Functionality from Untrusted Control Sphere
CWE-918 Server-Side Request Forgery (SSRF)

Affected Products

Product	Versions
kiotamicrosoft	>= 1.30.0, < 1.31.1Affected < 1.29.1Affected

References

Every record here comes from the CVE Program’s CVE List. © 1999–2026 The MITRE Corporation. CVE is a registered trademark of The MITRE Corporation. The records are reproduced under the CVE Program terms of use.