Vulnerability-Lookup

CVE-2026-59864 (GCVE-0-2026-59864)

Vulnerability from cvelistv5 – Published: 2026-07-16 14:45 – Updated: 2026-08-17 15:02

Title

Kiota: Path/URL injection into generated Copilot plugin manifest via x-ai-* extensions

Summary

Kiota is an OpenAPI based HTTP Client code generator. Prior to 1.29.1 and 1.32.5, `kiota plugin add` and `kiota plugin generate` (with `-t APIPlugin`) emitted attacker-controlled static_template.file values from x-ai-adaptive-card and x-ai-capabilities into generated Microsoft 365 Copilot and Teams plugin manifests without path validation, allowing ../, absolute, rooted, UNC, Windows drive, or URI paths in response_semantics.static_template.file to cause path traversal or out-of-package file inclusion when the generated plugin was deployed. This issue is fixed in version 1.29.1 and 1.32.5.

Severity

9.3 (Critical)


                        
                          CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

SSVC

Exploitation: none Automatable: yes Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-07-16 00:00 UTC

CWE

CWE-22 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
CWE-829 - Inclusion of Functionality from Untrusted Control Sphere

Assigner

GitHub_M CNA under the mitre root

CNA scorecard C 72/100 over 8081 records in the last 180 days details

References

4 references

URL	Tags
https://github.com/microsoft/kiota/security/advis…	x_refsource_CONFIRM
https://github.com/microsoft/kiota/pull/7892	x_refsource_MISC
https://github.com/microsoft/kiota/commit/9a18599…	x_refsource_MISC
https://github.com/microsoft/kiota/releases/tag/v1.32.5	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version	CPE status
microsoft	kiota	Affected: >= 1.30.0, < 1.31.1 Affected: < 1.29.1	guessed

Show details on NVD website

JSON

To clipboard

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}

FKIE_CVE-2026-59864

Vulnerability from fkie_nvd - Published: 2026-07-16 16:19 - Updated: 2026-10-24 20:10

Severity

9.3 (Critical) - CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

Summary

References

	URL	Tags
	security-advisories@github.com	https://github.com/microsoft/kiota/commit/9a185994a4e549b7bba3cc2beffb9736aa902e79
	security-advisories@github.com	https://github.com/microsoft/kiota/pull/7892
	security-advisories@github.com	https://github.com/microsoft/kiota/releases/tag/v1.32.5
	security-advisories@github.com	https://github.com/microsoft/kiota/security/advisories/GHSA-4jwf-m4wg-8p66

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "kiota",
          "vendor": "microsoft",
          "versions": [
            {
              "status": "affected",
              "version": "\u003e= 1.30.0, \u003c 1.31.1"
            },
            {
              "status": "affected",
              "version": "\u003c 1.29.1"
            }
          ]
        }
      ],
      "source": "security-advisories@github.com"
    }
  ],
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    },
    {
      "lang": "es",
      "value": "Kiota es un generador de c\u00f3digo de cliente HTTP basado en OpenAPI. Antes de la versi\u00f3n 1.32.5, \u201ckiota plugin add\u201d y \u201ckiota plugin generate\u201d (con \u201c-t APIPlugin\u201d) emit\u00edan valores de static_template.file controlados por el atacante desde x-ai-adaptive-card y x-ai-capabilities en los manifiestos de plugin generados de Microsoft 365 Copilot y Teams sin validaci\u00f3n de ruta, permitiendo que rutas .. / , absolutas, ra\u00edz, UNC, de unidad de Windows o URI en response_semantics.static_template.file causaran salto de ruta o inclusi\u00f3n de ficheros fuera del paquete cuando el plugin generado era desplegado. Este problema est\u00e1 solucionado en la versi\u00f3n 1.32.5."
    }
  ],
  "id": "CVE-2026-59864",
  "lastModified": "2026-10-24T20:10:00.137",
  "metrics": {
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          "baseScore": 9.3,
          "baseSeverity": "CRITICAL",
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          "version": "4.0",
          "vulnAvailabilityImpact": "HIGH",
          "vulnConfidentialityImpact": "HIGH",
          "vulnIntegrityImpact": "HIGH",
          "vulnerabilityResponseEffort": "NOT_DEFINED"
        },
        "source": "security-advisories@github.com",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-59864",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-07-16T00:00:00+00:00",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-07-16T16:19:15.240",
  "references": [
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/microsoft/kiota/commit/9a185994a4e549b7bba3cc2beffb9736aa902e79"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/microsoft/kiota/pull/7892"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/microsoft/kiota/releases/tag/v1.32.5"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/microsoft/kiota/security/advisories/GHSA-4jwf-m4wg-8p66"
    }
  ],
  "sourceIdentifier": "security-advisories@github.com",
  "vulnStatus": "Deferred",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-22"
        },
        {
          "lang": "en",
          "value": "CWE-829"
        }
      ],
      "source": "security-advisories@github.com",
      "type": "Secondary"
    }
  ]
}

GHSA-4JWF-M4WG-8P66

Vulnerability from github – Published: 2026-07-24 15:58 – Updated: 2026-08-17 14:54

Summary

Microsoft Kiota: Path/URL injection into generated Copilot plugin manifest via x-ai-* extensions

Details

Summary

kiota plugin add / kiota plugin generate (with -t APIPlugin) emits an attacker-controlled static_template.file path from the AI-plugin extensions (x-ai-adaptive-card, x-ai-capabilities) verbatim, with no path validation, into the generated Microsoft 365 Copilot / Teams plugin manifest (<name>-apiplugin.json). An attacker-controlled or compromised OpenAPI description can therefore embed a ../ / absolute path into the manifest's response_semantics.static_template.file, yielding a path traversal (CWE-22) / out-of-package file inclusion (CWE-829) that is resolved by the AI host when the generated plugin is deployed.

Confirmed on Kiota 1.32.4 (KIOTA_CONFIG_PREVIEW=true, the self-contained linux-x64 release binary).

Details

Both extension paths write the static_template.file reference straight into the manifest without sanitization — PluginsGenerationService.GetResponseSemanticsFromAdaptiveCardExtension mints static_template = {"file": <File>}, and the x-ai-capabilities path copies the static_template object through:

# spec                                                  -> generated manifest (functions[].capabilities.response_semantics)
x-ai-adaptive-card: {title: T, data_path: $.x,
   file: "../../../../../../etc/passwd"}                -> static_template.file = "../../../../../../etc/passwd"   (CWE-22)
x-ai-capabilities.response_semantics.static_template:
   {file: "../../../../../../etc/passwd"}               -> static_template.file = "../../../../../../etc/passwd"   (CWE-22)

(x-ai-adaptive-card.file only reaches the manifest when title is set, so GetResponseSemanticsFromAdaptiveCardExtension fires; otherwise kiota writes its own template card instead.)

Impact

This is not local code execution on the build host. The injected path is written into the generated plugin manifest and realized downstream, when the plugin is packaged and sideloaded / deployed to an AI host (Microsoft 365 Copilot / Teams) that resolves static_template.file relative to the plugin package (out-of-package file reference via ../). Kiota is the propagation point: it fails to reject ../ and absolute paths in this provider-supplied field before writing it into the manifest.

Patches

Fixed in 1.29.1 and 1.32.5 (https://github.com/microsoft/kiota/pull/7892). static_template.file from both x-ai-adaptive-card and x-ai-capabilities is validated as a relative path confined to the plugin output package: absolute URIs, rooted/UNC paths, Windows drive paths, and .. traversal segments are rejected, and unsafe references are dropped with a warning. Regression tests cover .., absolute paths, and URI values.

Remediation

Upgrade to Kiota 1.29.1, 1.32.5 or later and regenerate affected plugins.

Severity

9.3 (Critical)


                  
                    CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

Show details on source website

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{
  "affected": [
    {
      "package": {
        "ecosystem": "NuGet",
        "name": "Microsoft.OpenApi.Kiota"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "1.30.0"
            },
            {
              "fixed": "1.32.5"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "NuGet",
        "name": "Microsoft.OpenApi.Kiota.Builder"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "1.30.0"
            },
            {
              "fixed": "1.32.5"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "NuGet",
        "name": "Microsoft.OpenApi.Kiota"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.29.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "NuGet",
        "name": "Microsoft.OpenApi.Kiota.Builder"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.29.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-59864"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-22",
      "CWE-829"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-07-24T15:58:31Z",
    "nvd_published_at": "2026-07-16T16:19:15Z",
    "severity": "CRITICAL"
  },
  "details": "### Summary\n\n`kiota plugin add` / `kiota plugin generate` (with `-t APIPlugin`) emits an attacker-controlled `static_template.file` path from the AI-plugin extensions (`x-ai-adaptive-card`, `x-ai-capabilities`) **verbatim**, with no path validation, into the generated Microsoft 365 Copilot / Teams plugin manifest (`\u003cname\u003e-apiplugin.json`). An attacker-controlled or compromised OpenAPI description can therefore embed a `../` / absolute path into the manifest\u0027s `response_semantics.static_template.file`, yielding a **path traversal (CWE-22)** / out-of-package file inclusion (CWE-829) that is resolved by the AI host when the generated plugin is deployed.\n\nConfirmed on Kiota **1.32.4** (`KIOTA_CONFIG_PREVIEW=true`, the self-contained `linux-x64` release binary).\n\n### Details\n\nBoth extension paths write the `static_template.file` reference straight into the manifest without sanitization \u2014 `PluginsGenerationService.GetResponseSemanticsFromAdaptiveCardExtension` mints `static_template = {\"file\": \u003cFile\u003e}`, and the `x-ai-capabilities` path copies the `static_template` object through:\n\n```\n# spec                                                  -\u003e generated manifest (functions[].capabilities.response_semantics)\nx-ai-adaptive-card: {title: T, data_path: $.x,\n   file: \"../../../../../../etc/passwd\"}                -\u003e static_template.file = \"../../../../../../etc/passwd\"   (CWE-22)\nx-ai-capabilities.response_semantics.static_template:\n   {file: \"../../../../../../etc/passwd\"}               -\u003e static_template.file = \"../../../../../../etc/passwd\"   (CWE-22)\n```\n\n(`x-ai-adaptive-card.file` only reaches the manifest when `title` is set, so `GetResponseSemanticsFromAdaptiveCardExtension` fires; otherwise kiota writes its own template card instead.)\n\n### Impact\n\n**This is not local code execution on the build host.** The injected path is written into the generated plugin manifest and realized **downstream**, when the plugin is packaged and sideloaded / deployed to an AI host (Microsoft 365 Copilot / Teams) that resolves `static_template.file` relative to the plugin package (out-of-package file reference via `../`). Kiota is the propagation point: it fails to reject `../` and absolute paths in this provider-supplied field before writing it into the manifest.\n\n### Patches\n\nFixed in **1.29.1 and 1.32.5** (https://github.com/microsoft/kiota/pull/7892). `static_template.file` from both `x-ai-adaptive-card` and `x-ai-capabilities` is validated as a relative path confined to the plugin output package: absolute URIs, rooted/UNC paths, Windows drive paths, and `..` traversal segments are rejected, and unsafe references are dropped with a warning. Regression tests cover `..`, absolute paths, and URI values.\n\n### Remediation\n\nUpgrade to Kiota **1.29.1, 1.32.5** or later and regenerate affected plugins.",
  "id": "GHSA-4jwf-m4wg-8p66",
  "modified": "2026-08-17T14:54:42Z",
  "published": "2026-07-24T15:58:31Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/microsoft/kiota/security/advisories/GHSA-4jwf-m4wg-8p66"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-59864"
    },
    {
      "type": "WEB",
      "url": "https://github.com/microsoft/kiota/pull/7892"
    },
    {
      "type": "WEB",
      "url": "https://github.com/microsoft/kiota/commit/9a185994a4e549b7bba3cc2beffb9736aa902e79"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/microsoft/kiota"
    },
    {
      "type": "WEB",
      "url": "https://github.com/microsoft/kiota/releases/tag/v1.32.5"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "Microsoft Kiota: Path/URL injection into generated Copilot plugin manifest via x-ai-* extensions"
}

Sightings

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Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

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CVE-2026-59864 (GCVE-0-2026-59864)

FKIE_CVE-2026-59864

GHSA-4JWF-M4WG-8P66

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