What’s Vulnerable › Vulnerabilities

CVE-2026-59859: Kiota: Code Generation Literal Injection in the PHP Generator

• Severity: high (CVSS 8.7 v4.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.4% 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 1.32.4, 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.

Affected products

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

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

Get alerted when CVE-2026-59859 or the next vulnerability affects your stack