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

Quick assessment

Affected
microsoft kiota
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Microsoft kiota是美国Microsoft公司的API平台生成工具。 Microsoft Kiota 1.32.5之前版本存在安全漏洞，该漏洞源于解析OpenAPI $ref值时获取远程http(s)URL并读取本地绝对或树外文件路径，可能导致服务端请求伪造、远程文件包含和本地文件包含。

CVSS 7.1 · High EPSS 2.39% · P83

Affected Version Matrix 2

VendorProduct Version RangeStatus
microsoft kiota >= 1.30.0, < 1.31.1 affected
< 1.29.1 affected
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I. Basic Information for CVE-2026-59867

Vulnerability Information
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Vulnerability Title
Kiota: Generation-time SSRF + remote/local file inclusion via unrestricted $ref
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
对路径名的限制不恰当(路径遍历)
Source: CVE Program / CVE List V5
Vulnerability Title
Microsoft Kiota 路径遍历漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Microsoft kiota是美国Microsoft公司的API平台生成工具。 Microsoft Kiota 1.32.5之前版本存在安全漏洞，该漏洞源于解析OpenAPI $ref值时获取远程http(s)URL并读取本地绝对或树外文件路径，可能导致服务端请求伪造、远程文件包含和本地文件包含。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
microsoft kiota >= 1.30.0, < 1.31.1 -

II. Public POCs for CVE-2026-59867

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Reproduced successfully in a real sandbox · Below is the actual recording of building the environment and exploiting the vulnerability.
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claude_code · 9404 chars
GitHub 复现环境（可 clone 直接跑）
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III. Intelligence Information for CVE-2026-59867

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Patches & Fixes for CVE-2026-59867 (1)

Vendor Advisories for CVE-2026-59867 (1)

Vendor Pages for CVE-2026-59867 (1)

Same Patch Batch · microsoft · 2026-07-16 · 20 CVEs total

CVE-2026-59866 9.3 CRITICAL Kiota: Arbitrary file write + code-injection via x-ms-kiota-info clientClassName and clien
CVE-2026-59864 9.3 CRITICAL Kiota: Path/URL injection into generated Copilot plugin manifest via x-ai-* extensions
CVE-2026-59865 9.3 CRITICAL Kiota: Command injection via x-ms-kiota-info dependencyInstallCommand surfaced by `kiota i
CVE-2026-59860 8.7 HIGH Kiota: XML Doc-Comment Newline Breakout Code Injection
CVE-2026-59859 8.7 HIGH Kiota: Code Generation Literal Injection in the PHP Generator
CVE-2026-57206 8.6 HIGH SimpleChat plugin validation endpoints missing authentication and authorization
CVE-2026-59117 7.5 HIGH Windows Terminal Remote Code Execution Vulnerability
CVE-2026-59861 7.5 HIGH Kiota: Code Generation Literal Injection in Kiota Ruby Generator
CVE-2026-59862 7.5 HIGH Kiota: Code Generation Literal Injection in the Python Generator
CVE-2026-53598 7.5 HIGH Prompty: Arbitrary File Read via ${file:path} Reference Expansion
CVE-2026-58598 7.0 HIGH Windows Backup Service Elevation of Privilege Vulnerability
CVE-2026-59863 7.0 HIGH Kiota: Workspace-config poisoning: out-of-repo file write + generation-time SSRF
CVE-2026-55440 6.5 MEDIUM Microsoft UFO: COMMAND_RESULTS handler creates unowned sessions, allowing authenticated se
CVE-2026-58643 6.1 MEDIUM Windows Admin Center Spoofing Vulnerability
CVE-2026-62826 4.6 MEDIUM Microsoft SharePoint Server Spoofing Vulnerability
CVE-2026-57205 4.3 MEDIUM SimpleChat: Authenticated users can access other users' profile metadata through user IDOR
CVE-2026-54568 4.3 MEDIUM Microsoft UFO: Missing Authorization in DEVICE_INFO_REQUEST Allows a DEVICE Client to Read
CVE-2026-54733 moodle-local_o365: Authentication bypass via unverified JWT signature in Teams SSO endpoin
CVE-2026-53597 Prompty: Arbitrary code execution via JavaScript frontmatter in TypeScript loader

IV. Related Vulnerabilities

Same product: kiota
Same vendor: microsoft
Same weakness: CWE-22

V. Comments for CVE-2026-59867

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