CVE-2026-59861

{
  "id": "CVE-2026-59861",
  "sourceIdentifier": "[email protected]",
  "published": "2026-07-16T15:16:35.440",
  "lastModified": "2026-10-24T21:10:00.130",
  "vulnStatus": "Deferred",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Kiota is an OpenAPI based HTTP Client code generator. Prior to 1.29.1 and 1.32.0, Kiota's Ruby generator embedded OpenAPI default fields, property names, and other schema-derived strings through CodeMethodWriter.cs and SanitizeForQuotedLiteral() in Writers/StringExtensions.cs into Ruby double-quoted literals without escaping #, allowing attacker-controlled #{expr}, #$var, or #@var interpolation markers to inject arbitrary Ruby code into generated model classes. This issue is fixed in version 1.29.1 and 1.32.0."
    },
    {
      "lang": "es",
      "value": "Kiota es un generador de código de cliente HTTP basado en OpenAPI. Antes de la versión 1.32.0, el generador Ruby de Kiota incrustaba campos predeterminados de OpenAPI, nombres de propiedades y otras cadenas derivadas del esquema a través de CodeMethodWriter.cs y SanitizeForQuotedLiteral() en Writers/StringExtensions.cs en literales de Ruby entre comillas dobles sin escapar #, permitiendo que los marcadores de interpolación #{expr}, #$var o #@var controlados por el atacante inyectaran código Ruby arbitrario en las clases de modelo generadas. Este problema se corrigió en la versión 1.32.0."
    }
  ],
  "affected": [
    {
      "source": "[email protected]",
      "affectedData": [
        {
          "vendor": "microsoft",
          "product": "kiota",
          "versions": [
            {
              "version": ">= 1.30.0, < 1.31.1",
              "status": "affected"
            },
            {
              "version": "< 1.29.1",
              "status": "affected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {
    "cvssMetricV31": [
      {
        "source": "[email protected]",
        "type": "Secondary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
          "baseScore": 7.5,
          "baseSeverity": "HIGH",
          "attackVector": "NETWORK",
          "attackComplexity": "LOW",
          "privilegesRequired": "NONE",
          "userInteraction": "NONE",
          "scope": "UNCHANGED",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "availabilityImpact": "HIGH"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 3.6
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "timestamp": "2026-07-17T03:56:35.781411Z",
          "id": "CVE-2026-59861",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "role": "CISA Coordinator",
          "version": "2.0.3"
        }
      }
    ]
  },
  "weaknesses": [
    {
      "source": "[email protected]",
      "type": "Secondary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-94"
        }
      ]
    }
  ],
  "references": [
    {
      "url": "https://github.com/microsoft/kiota/commit/fee1b648bb4394ba7ba72de9c0ce4f2a0bad0cb6",
      "source": "[email protected]"
    },
    {
      "url": "https://github.com/microsoft/kiota/pull/7746",
      "source": "[email protected]"
    },
    {
      "url": "https://github.com/microsoft/kiota/releases/tag/v1.32.0",
      "source": "[email protected]"
    },
    {
      "url": "https://github.com/microsoft/kiota/security/advisories/GHSA-xg2h-5xr2-29jw",
      "source": "[email protected]"
    }
  ]
}