Vulnerability Description
Kiota is an OpenAPI based HTTP Client code generator. Prior to 1.29.1 and 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 1.29.1 and 1.32.4.
Related Weaknesses (CWE)
References
- https://github.com/microsoft/kiota/commit/5e2a211ac4261988fbdc72c3b268596ea8837b
- 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
FAQ
What is CVE-2026-59859?
CVE-2026-59859 is a documented vulnerability. Kiota is an OpenAPI based HTTP Client code generator. Prior to 1.29.1 and 1.32.4, Kiota's PHP generator embedded OpenAPI description, default fields, property names, and other schema-derived strings i...
How severe is CVE-2026-59859?
CVSS scoring is not yet available for CVE-2026-59859. Check NVD for updates.
Is there a patch for CVE-2026-59859?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.