Vulnerability-Lookup

GHSA-4JWF-M4WG-8P66

Vulnerability from github – Published: 2026-07-24 15:58 – Updated: 2026-07-24 15:58

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 1.32.5 (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 1.32.5 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

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "NuGet",
        "name": "Microsoft.OpenApi.Kiota"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.32.5"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "NuGet",
        "name": "Microsoft.OpenApi.Kiota.Builder"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.32.5"
            }
          ],
          "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 **1.32.5** (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 **1.32.5** or later and regenerate affected plugins.",
  "id": "GHSA-4jwf-m4wg-8p66",
  "modified": "2026-07-24T15:58:31Z",
  "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"
}

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

Vulnerability from cvelistv5 – Published: 2026-07-16 14:45 – Updated: 2026-07-17 03:56

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 1.32.5, `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 1.32.5.

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 (v2.0.3)

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

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
microsoft	kiota	Affected: < 1.32.5

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-59864",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-07-16T00:00:00+00:00",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-07-17T03:56:38.964Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "kiota",
          "vendor": "microsoft",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 1.32.5"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "Kiota is an OpenAPI based HTTP Client code generator. Prior to 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 1.32.5."
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "attackComplexity": "LOW",
            "attackRequirements": "NONE",
            "attackVector": "NETWORK",
            "baseScore": 9.3,
            "baseSeverity": "CRITICAL",
            "privilegesRequired": "NONE",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "NONE",
            "subIntegrityImpact": "NONE",
            "userInteraction": "NONE",
            "vectorString": "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",
            "version": "4.0",
            "vulnAvailabilityImpact": "HIGH",
            "vulnConfidentialityImpact": "HIGH",
            "vulnIntegrityImpact": "HIGH"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-22",
              "description": "CWE-22: Improper Limitation of a Pathname to a Restricted Directory (\u0027Path Traversal\u0027)",
              "lang": "en",
              "type": "CWE"
            }
          ]
        },
        {
          "descriptions": [
            {
              "cweId": "CWE-829",
              "description": "CWE-829: Inclusion of Functionality from Untrusted Control Sphere",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-07-16T14:45:36.247Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/microsoft/kiota/security/advisories/GHSA-4jwf-m4wg-8p66",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/microsoft/kiota/security/advisories/GHSA-4jwf-m4wg-8p66"
        },
        {
          "name": "https://github.com/microsoft/kiota/pull/7892",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/microsoft/kiota/pull/7892"
        },
        {
          "name": "https://github.com/microsoft/kiota/commit/9a185994a4e549b7bba3cc2beffb9736aa902e79",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/microsoft/kiota/commit/9a185994a4e549b7bba3cc2beffb9736aa902e79"
        },
        {
          "name": "https://github.com/microsoft/kiota/releases/tag/v1.32.5",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/microsoft/kiota/releases/tag/v1.32.5"
        }
      ],
      "source": {
        "advisory": "GHSA-4jwf-m4wg-8p66",
        "discovery": "UNKNOWN"
      },
      "title": "Kiota: Path/URL injection into generated Copilot plugin manifest via x-ai-* extensions"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-59864",
    "datePublished": "2026-07-16T14:45:36.247Z",
    "dateReserved": "2026-07-07T15:41:53.607Z",
    "dateUpdated": "2026-07-17T03:56:38.964Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.

Action not permitted

GHSA-4JWF-M4WG-8P66

Summary

Details

Impact

Patches

Remediation

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

Tags

Sightings

Nomenclature