CVE-2026-59859: Code Injection

Description

Kiota is an OpenAPI based HTTP Client code generator. Prior to 1.32.4, Kiota's PHP generator embedded OpenAPI description, default fields, property names, and other schema-derived strings into PHP double-quoted literals through SanitizeDoubleQuote() in Writers/StringExtensions.cs without escaping $, allowing attacker-controlled ${...}, $var, or {$obj->prop} interpolation constructs to inject arbitrary PHP code into generated model and request-builder classes. This issue is fixed in version 1.32.4.

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Weakness Type (CWE)

CWE-94 CWE-94

References

Other References

https://github.com/microsoft/kiota/commit/5e2a211ac4261988fbdc72c3b268596ea8837b87 https://github.com/microsoft/kiota/pull/7863 https://github.com/microsoft/kiota/releases/tag/v1.32.4 https://github.com/microsoft/kiota/security/advisories/GHSA-jqwh-526h-c92j

Frequently Asked Questions

What is CVE-2026-59859? +

Kiota is an OpenAPI based HTTP Client code generator. Prior to 1.32.4, Kiota's PHP generator embedded OpenAPI description, default fields, property names, and other schema-derived strings into PHP double-quoted literals through SanitizeDoubleQuote() in Writers/StringExtensions.cs without escaping $, allowing attacker-controlled ${...}, $var, or {$obj->prop} interpolation constructs to inject arbitrary PHP code into generated model and request-builder classes. This issue is fixed in version 1.32.4.

How do I check if I'm vulnerable to CVE-2026-59859? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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