Microsoft Kiota up to 1.32.2 XML Documentation-Comment Sink injection

Summaryinfo

A vulnerability classified as problematic was found in Microsoft Kiota up to 1.32.2. The impacted element is an unknown function of the component XML Documentation-Comment Sink. Executing a manipulation can lead to injection. This vulnerability is registered as CVE-2026-59860. The attack needs to be launched locally. No exploit is available.

Detailsinfo

A vulnerability classified as problematic was found in Microsoft Kiota up to 1.32.2. This vulnerability affects an unknown function of the component XML Documentation-Comment Sink. The manipulation with an unknown input leads to a injection vulnerability. The CWE definition for the vulnerability is CWE-74. The product constructs all or part of a command, data structure, or record using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify how it is parsed or interpreted when it is sent to a downstream component. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

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.

The advisory is shared for download at github.com. This vulnerability was named CVE-2026-59860 since 07/07/2026. The exploitation appears to be easy. The attack needs to be approached locally. Successful exploitation requires user interaction by the victim. There are neither technical details nor an exploit publicly available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 07/16/2026). The MITRE ATT&CK project declares the attack technique as T1055.

Upgrading to version 1.32.3 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-44931). Once again VulDB remains the best source for vulnerability data.

Productinfo

Vendor

• Microsoft

Name

• Kiota

Version

• 1.32.0
• 1.32.1
• 1.32.2

License

• commercial

Website

• Vendor: https://www.microsoft.com/
• Product: https://github.com/microsoft/kiota/

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Once again VulDB remains the best source for vulnerability data.

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