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CVE-2026-59860— Kiota: XML Doc-Comment Newline Breakout Code Injection

CVSS 8.7 · High EPSS 1.02% · P60

Possible ATT&CK Techniques 1AI

T1195 · Supply Chain Compromise

Affected Version Matrix 1

VendorProductVersion RangeStatus
microsoftkiota< 1.32.3affected
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I. Basic Information for CVE-2026-59860

Vulnerability Information
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Vulnerability Title
Kiota: XML Doc-Comment Newline Breakout Code Injection
Source: CVE Program / CVE List V5
Vulnerability Description
Kiota is an OpenAPI based HTTP Client code generator. Prior to 1.32.3, Kiota is affected by a code-generation injection vulnerability in the C# XML documentation-comment sink (the description, externalDocs label, and externalDocs link fields emitted as /// … comments). When text from an OpenAPI description is written into single-line XML doc comments without stripping newline and Unicode line-terminator characters, an attacker can break out of the /// comment line and inject additional code into generated C# clients. This issue is fixed in version 1.32.3.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
对生成代码的控制不恰当(代码注入)
Source: CVE Program / CVE List V5
Vulnerability Title
Microsoft Kiota 代码注入漏洞
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 1.32.3之前版本存在代码注入漏洞，该漏洞源于C# XML文档注释接收器（description、externalDocs标签和externalDocs链接字段以///注释形式输出）存在代码生成注入问题，攻击者可利用换行符和Unicode行终止符突破///注释行，向生成的C#客户端中注入额外代码。
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 < 1.32.3 -

II. Public POCs for CVE-2026-59860

#POC DescriptionSource LinkShenlong Link
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Qwen3.6-35B-A3B · 6882 chars
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III. Intelligence Information for CVE-2026-59860

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Patches & Fixes for CVE-2026-59860 (2)

Vendor Advisories for CVE-2026-59860 (1)

Vendor Pages for CVE-2026-59860 (1)

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

CVE-2026-598659.3 CRITICALKiota: Command injection via x-ms-kiota-info dependencyInstallCommand surfaced by `kiota i
CVE-2026-598669.3 CRITICALKiota: Arbitrary file write + code-injection via x-ms-kiota-info clientClassName and clien
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-2026-598617.5 HIGHKiota: Code Generation Literal Injection in Kiota Ruby Generator
CVE-2026-591177.5 HIGHWindows Terminal Remote Code Execution Vulnerability
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-2026-554406.5 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-2026-59864Kiota: Path/URL injection into generated Copilot plugin manifest via x-ai-* extensions
CVE-2026-53597Prompty: Arbitrary code execution via JavaScript frontmatter in TypeScript loader
CVE-2026-59863Kiota: Workspace-config poisoning: out-of-repo file write + generation-time SSRF

IV. Related Vulnerabilities

Same product: kiota
Same vendor: microsoft
Same weakness: CWE-94

V. Comments for CVE-2026-59860

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