What’s Vulnerable › Vulnerabilities

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

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 2.0% 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-94

Description

Kiota is an OpenAPI based HTTP Client code generator. Prior to 1.29.1 and 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 1.29.1 and 1.32.0.

Affected products

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

References

• https://github.com/microsoft/kiota/commit/fee1b648bb4394ba7ba72de9c0ce4f2a0bad0cb6
• https://github.com/microsoft/kiota/pull/7746
• https://github.com/microsoft/kiota/releases/tag/v1.32.0
• https://github.com/microsoft/kiota/security/advisories/GHSA-xg2h-5xr2-29jw

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