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CVE-2026-59861— Kiota: Code Generation Literal Injection in Kiota Ruby Generator

CVSS 7.5 · High

Possible ATT&CK Techniques 1AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 1

VendorProductVersion RangeStatus
microsoftkiota< 1.32.0affected
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I. Basic Information for CVE-2026-59861

Vulnerability Information
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Vulnerability Title
Kiota: Code Generation Literal Injection in Kiota Ruby Generator
Source: NVD (National Vulnerability Database)
Vulnerability Description
Kiota is an OpenAPI based HTTP Client code generator. Prior to 1.32.0, Kiota's Ruby generator embedded OpenAPI default fields, property names, and other schema-derived strings through CodeMethodWriter.cs and SanitizeForQuotedLiteral() in Writers/StringExtensions.cs into Ruby double-quoted literals without escaping #, allowing attacker-controlled #{expr}, #$var, or #@var interpolation markers to inject arbitrary Ruby code into generated model classes. This issue is fixed in version 1.32.0.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: NVD (National Vulnerability Database)
Vulnerability Type
对生成代码的控制不恰当(代码注入)
Source: NVD (National Vulnerability Database)

Affected Products

VendorProductAffected VersionsCPESubscribe
microsoftkiota < 1.32.0 -

II. Public POCs for CVE-2026-59861

#POC DescriptionSource LinkShenlong Link
AI-Generated POCPremium
Qwen3.6-35B-A3B · 6156 chars
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III. Intelligence Information for CVE-2026-59861

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Patches & Fixes for CVE-2026-59861 (2)

Vendor Advisories for CVE-2026-59861 (1)

Vendor Pages for CVE-2026-59861 (1)

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

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CVE-2026-59863Kiota: Workspace-config poisoning: out-of-repo file write + generation-time SSRF
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CVE-2026-53597Prompty: Arbitrary code execution via JavaScript frontmatter in TypeScript loader

IV. Related Vulnerabilities

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

V. Comments for CVE-2026-59861

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