FKIE_CVE-2026-73851

Vulnerability from fkie_nvd - Published: 2026-08-17 15:16 - Updated: 2026-08-17 16:17
Severity
6.1 (Medium) - CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:H/SI:N/SA:N
Summary
Kiota is an OpenAPI based HTTP Client code generator. Prior to 1.29.1 and 1.34.0, an attacker who controls or tampers with the OpenAPI description consumed by Kiota can supply a file reference that resolves outside the manifest package (e.g. ../../../../etc/passwd, an absolute path, or a file:// / http(s):// URI). When the generated manifest is deployed and consumed by an AI host, this can lead to inclusion or disclosure of files outside the intended package boundary. This vulnerability is fixed in 1.29.1 and 1.34.0.
References
security-advisories@github.comhttps://github.com/microsoft/kiota/commit/430008e9d700b3fe80f206c672415cfbd8e830e7
security-advisories@github.comhttps://github.com/microsoft/kiota/commit/de3d18d9fe31ced4ac749728d3a2f94811f59268
security-advisories@github.comhttps://github.com/microsoft/kiota/issues/7912
security-advisories@github.comhttps://github.com/microsoft/kiota/pull/7910
security-advisories@github.comhttps://github.com/microsoft/kiota/pull/7913
security-advisories@github.comhttps://github.com/microsoft/kiota/releases/tag/v1.29.1
security-advisories@github.comhttps://github.com/microsoft/kiota/releases/tag/v1.34.0
security-advisories@github.comhttps://github.com/microsoft/kiota/security/advisories/GHSA-p5rm-jg5c-8c77
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "kiota",
          "vendor": "microsoft",
          "versions": [
            {
              "status": "affected",
              "version": "\u003e= 1.30.0, \u003c 1.34.0"
            },
            {
              "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 1.34.0, an attacker who controls or tampers with the OpenAPI description consumed by Kiota can supply a file reference that resolves outside the manifest package (e.g. ../../../../etc/passwd, an absolute path, or a file:// / http(s):// URI). When the generated manifest is deployed and consumed by an AI host, this can lead to inclusion or disclosure of files outside the intended package boundary. This vulnerability is fixed in 1.29.1 and 1.34.0."
    }
  ],
  "id": "CVE-2026-73851",
  "lastModified": "2026-08-17T16:17:47.677",
  "metrics": {
    "cvssMetricV40": [
      {
        "cvssData": {
          "Automatable": "NOT_DEFINED",
          "Recovery": "NOT_DEFINED",
          "Safety": "NOT_DEFINED",
          "attackComplexity": "LOW",
          "attackRequirements": "NONE",
          "attackVector": "NETWORK",
          "availabilityRequirement": "NOT_DEFINED",
          "baseScore": 6.1,
          "baseSeverity": "MEDIUM",
          "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": "HIGH",
          "subIntegrityImpact": "NONE",
          "userInteraction": "ACTIVE",
          "valueDensity": "NOT_DEFINED",
          "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:H/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
          "version": "4.0",
          "vulnAvailabilityImpact": "NONE",
          "vulnConfidentialityImpact": "NONE",
          "vulnIntegrityImpact": "NONE",
          "vulnerabilityResponseEffort": "NOT_DEFINED"
        },
        "source": "security-advisories@github.com",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-73851",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-08-17T15:26:24.544956Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-08-17T15:16:57.980",
  "references": [
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/microsoft/kiota/commit/430008e9d700b3fe80f206c672415cfbd8e830e7"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/microsoft/kiota/commit/de3d18d9fe31ced4ac749728d3a2f94811f59268"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/microsoft/kiota/issues/7912"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/microsoft/kiota/pull/7910"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/microsoft/kiota/pull/7913"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/microsoft/kiota/releases/tag/v1.29.1"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/microsoft/kiota/releases/tag/v1.34.0"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/microsoft/kiota/security/advisories/GHSA-p5rm-jg5c-8c77"
    }
  ],
  "sourceIdentifier": "security-advisories@github.com",
  "vulnStatus": "Received",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-22"
        },
        {
          "lang": "en",
          "value": "CWE-829"
        }
      ],
      "source": "security-advisories@github.com",
      "type": "Secondary"
    }
  ]
}



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