CVE-2026-59859: high-severity vulnerability in microsoft kiota
Kiota: Code Generation Literal Injection in the PHP Generator
Published · Updated
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21Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 8.7epss 1.4%
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.
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Affected products
microsoft · kiotaRelated CVEs — microsoft kiota
In the same product, most dangerous first.
CVE-2026-59865CRITICALKiota: Command injection via x-ms-kiota-info dependencyInstallCommand surfaced by `kiota info`EPSS 4.4%CVE-2026-59867HIGHKiota: Generation-time SSRF + remote/local file inclusion via unrestricted $refEPSS 2.4%CVE-2026-73851MEDIUMKiota: Path traversal in generated plugin manifest static_template.file reference (percent-encoding bypass)EPSS 2.3%CVE-2026-59861HIGHKiota: Code Generation Literal Injection in Kiota Ruby GeneratorEPSS 2.0%CVE-2026-59866CRITICALKiota: Arbitrary file write + code-injection via x-ms-kiota-info clientClassName and clientNamespaceNameEPSS 1.4%CVE-2026-59860HIGHKiota: XML Doc-Comment Newline Breakout Code InjectionEPSS 1.4%