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CVE-2026-59864— Kiota: Path/URL injection into generated Copilot plugin manifest via x-ai-* extensions

CVSS 9.3 · Critical EPSS 1.27% · P67

Affected Version Matrix 2

VendorProductVersion RangeStatus
microsoftkiota>= 1.30.0, < 1.31.1affected
< 1.29.1affected
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I. Basic Information for CVE-2026-59864

Vulnerability Information
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Vulnerability Title
Kiota: Path/URL injection into generated Copilot plugin manifest via x-ai-* extensions
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 plugin add` and `kiota plugin generate` (with `-t APIPlugin`) emitted attacker-controlled static_template.file values from x-ai-adaptive-card and x-ai-capabilities into generated Microsoft 365 Copilot and Teams plugin manifests without path validation, allowing ../, absolute, rooted, UNC, Windows drive, or URI paths in response_semantics.static_template.file to cause path traversal or out-of-package file inclusion when the generated plugin was deployed. This issue is fixed in version 1.29.1 and 1.32.5.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA: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，该漏洞源于路径验证不足，导致kiota plugin add和kiota plugin generate命令从x-ai-adaptive-card和x-ai-capabilities中输出攻击者控制的static_template.file值到生成的Microsoft 365 Copilot和Teams插件清单，允许响应语义中的static_template.
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

VendorProductAffected VersionsCPESubscribe
microsoftkiota >= 1.30.0, < 1.31.1 -

II. Public POCs for CVE-2026-59864

#POC DescriptionSource LinkShenlong Link
AI-Generated POCPremium
Qwen3.6-35B-A3B · 6770 chars
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III. Intelligence Information for CVE-2026-59864

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Patches & Fixes for CVE-2026-59864 (2)

Vendor Advisories for CVE-2026-59864 (1)

Vendor Pages for CVE-2026-59864 (1)

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

CVE-2026-598669.3 CRITICALKiota: Arbitrary file write + code-injection via x-ms-kiota-info clientClassName and clien
CVE-2026-598659.3 CRITICALKiota: Command injection via x-ms-kiota-info dependencyInstallCommand surfaced by `kiota i
CVE-2026-598608.7 HIGHKiota: XML Doc-Comment Newline Breakout Code Injection
CVE-2026-598598.7 HIGHKiota: Code Generation Literal Injection in the PHP Generator
CVE-2026-572068.6 HIGHSimpleChat plugin validation endpoints missing authentication and authorization
CVE-2026-591177.5 HIGHWindows Terminal Remote Code Execution Vulnerability
CVE-2026-598617.5 HIGHKiota: Code Generation Literal Injection in Kiota Ruby Generator
CVE-2026-598627.5 HIGHKiota: Code Generation Literal Injection in the Python Generator
CVE-2026-535987.5 HIGHPrompty: Arbitrary File Read via ${file:path} Reference Expansion
CVE-2026-598677.1 HIGHKiota: Generation-time SSRF + remote/local file inclusion via unrestricted $ref
CVE-2026-585987.0 HIGHWindows Backup Service Elevation of Privilege Vulnerability
CVE-2026-598637.0 HIGHKiota: Workspace-config poisoning: out-of-repo file write + generation-time SSRF
CVE-2026-554406.5 MEDIUMMicrosoft UFO: COMMAND_RESULTS handler creates unowned sessions, allowing authenticated se
CVE-2026-586436.1 MEDIUMWindows Admin Center Spoofing Vulnerability
CVE-2026-628264.6 MEDIUMMicrosoft SharePoint Server Spoofing Vulnerability
CVE-2026-572054.3 MEDIUMSimpleChat: Authenticated users can access other users' profile metadata through user IDOR
CVE-2026-545684.3 MEDIUMMicrosoft UFO: Missing Authorization in DEVICE_INFO_REQUEST Allows a DEVICE Client to Read
CVE-2026-54733moodle-local_o365: Authentication bypass via unverified JWT signature in Teams SSO endpoin
CVE-2026-53597Prompty: 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-2026-59864

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