---
cve: "CVE-2026-59859"
severity: "HIGH"
cvss: 8.7
epss: "1%"
vendor: "Microsoft"
kev: false
exploited: false
published: "2026-07-16 15:16:35"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-09-03T08:40:10+02:00"
---

# CVE-2026-59859

> 8.7 HIGH · 🧪 PoC

## Beschreibung

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-Vektor

```
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
```

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Netzwerk | bad |
| AC Komplexität | Gering | bad |
| PR Privilegien | Keine | bad |

## Patch verfügbar (OSV)

- 071292ba58e3e2b4e569833ac88b1a7fe4433db7 (Commit)
- 70cd8bcba3ff1815f93187f3eb80ef96fd194d46 (Commit)

## Referenzen

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

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-59859) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_