High severity · published Jul 16, 2026
CVE-2026-59867
Kiota: Generation-time SSRF + remote/local file inclusion via unrestricted $ref
7.1
CVSS
2.4%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:L/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
High
Integrity
Low
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)2.4% · higher than 84% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
KI
kiota · microsoft
>= 1.30.0, < 1.31.1; < 1.29.1 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-59867
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-59867
github.com
https://github.com/microsoft/kiota/commit/cccd798027f0a20db796b3df6c64f9897a39d7b1
github.com
https://github.com/microsoft/kiota/pull/7888
github.com
https://github.com/microsoft/kiota/releases/tag/v1.32.5
github.com
https://github.com/microsoft/kiota/security/advisories/GHSA-rg4h-fpcp-2qm8
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