What’s Vulnerable › Vulnerabilities

CVE-2026-59867: Kiota: Generation-time SSRF + remote/local file inclusion via unrestricted $ref

• Severity: high (CVSS 7.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 2.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-07-16 · updated 2026-10-24
• Weakness: CWE-22

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 products

• microsoft kiota: from 1.30.0, < 1.31.1; before 1.29.1

References

• https://github.com/microsoft/kiota/commit/cccd798027f0a20db796b3df6c64f9897a39d7b1
• https://github.com/microsoft/kiota/pull/7888
• https://github.com/microsoft/kiota/releases/tag/v1.32.5
• https://github.com/microsoft/kiota/security/advisories/GHSA-rg4h-fpcp-2qm8

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