CVE-2026-59866

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Source

https://cve.org/CVERecord?id=CVE-2026-59866

Import Source

https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-59866.json

JSON Data

https://api.osv.dev/v1/vulns/CVE-2026-59866

Aliases

GHSA-4vv7-jj25-4gh6

Published

2026-07-16T14:46:50Z

Modified

2026-11-07T02:48:39Z

Severity

9.3 (Critical) CVSS_V4 - 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 CVSS Calculator

Summary

Kiota: Arbitrary file write + code-injection via x-ms-kiota-info clientClassName and clientNamespaceName

Details

Kiota is an OpenAPI based HTTP Client code generator. Prior to 1.29.1 and 1.32.5, Kiota emitted x-ms-kiota-info clientClassName and clientNamespaceName values without identifier or path sanitization as both generated client class or namespace names and generated output path components when kiota generate ran without -c/--class-name, allowing an attacker-controlled or compromised OpenAPI description to write generated source outside the -o output directory and inject arbitrary text into generated class or namespace declarations. This issue is fixed in version 1.29.1 and 1.32.5 by GenerationConfiguration.SanitizeClientClassName and SanitizeClientNamespaceName.

Database specific

{
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
        "CWE-22",
        "CWE-94"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/59xxx/CVE-2026-59866.json"
}

References

Affected packages

Git / github.com/microsoft/kiota

Affected ranges

Type

GIT

Repo

https://github.com/microsoft/kiota

Events

Introduced

6ccf6da832742181cba0ab02588c5795b2185e13

Fixed

071292ba58e3e2b4e569833ac88b1a7fe4433db7

Introduced

Fixed

2675c4a486237b350ef3b994cbfc5302847c3752

Fixed

dc812dbbf88ef7edf53a890d36b2f9d1460e947d

Fixed

38ba79b2069fc207ec2f3e8c87ea988eea486a64

Database specific

Show details

{
    "extracted_events": [
        {
            "range": [
                {
                    "introduced": "1.30.0"
                },
                {
                    "fixed": "1.31.1"
                }
            ],
            "source": "AFFECTED_FIELD",
            "strategy": "StringRangeExpression"
        },
        {
            "range": [
                {
                    "introduced": "0"
                },
                {
                    "fixed": "1.29.1"
                }
            ],
            "source": "AFFECTED_FIELD",
            "strategy": "StringRangeExpression"
        },
        {
            "range": [
                {
                    "fixed": "dc812dbbf88ef7edf53a890d36b2f9d1460e947d"
                }
            ],
            "source": "REFERENCES_COMMIT"
        },
        {
            "original_tag": "v1.32.5",
            "range": [
                {
                    "fixed": "38ba79b2069fc207ec2f3e8c87ea988eea486a64"
                }
            ],
            "source": "REFERENCES_TAG"
        }
    ]
}

Affected versions

v0.*

v0.0.10

v0.0.11

v0.0.12

v0.0.13

v0.0.14

v0.0.15

v0.0.16

v0.0.17

v0.0.18

v0.0.19

v0.0.2

v0.0.20

v0.0.21

v0.0.22

v0.0.23

v0.0.3

v0.0.4

v0.0.5

v0.0.6

v0.0.7

v0.0.8

v0.0.9

v0.1.0

v0.1.1

v0.1.2

v0.1.3

v0.10.0

v0.11.0

v0.11.1

v0.2.0

v0.2.1

v0.3.0

v0.4.0

v0.5.0

v0.5.1

v0.6.0

v0.7.0

v0.7.1

v0.8.0

v0.8.1

v0.8.2

v0.8.3

v0.9.0

v1.*

v1.0.0

v1.0.1

v1.1.0

v1.1.1

v1.10.0

v1.10.0-preview.202312220001

v1.10.1

v1.11.0

v1.11.0-preview.202401300001

v1.11.1

v1.11.1-preview.202402080001

v1.11.1-preview.202402150001

v1.11.1-preview.202402220001

v1.12

v1.12.0

v1.12.0-preview.202402220002

v1.12.0-preview.202402290001

v1.13.0

v1.13.0-preview.202403210001

v1.13.0-preview.202403280001

v1.14.0

v1.14.0-preview.202404120001

v1.14.0-preview.202404180001

v1.14.0-preview.202404250001

v1.15.0

v1.15.0-preview.202405090001

v1.15.0-preview.202405160001

v1.15.0-preview.202405230001

v1.15.0-preview.202405310001

v1.16.0

v1.16.0-preview.202406130001

v1.16.0-preview.202406210001

v1.16.0-preview.202406270001

v1.17.0

v1.17.0-preview.202408010001

v1.18.0

v1.18.0-preview.202408150001

v1.18.0-preview.202408220001

v1.18.0-preview.202408290001

v1.19.0

v1.19.0-preview.202409120001

v1.19.0-preview.202409200001

v1.19.0-preview.202409200002

v1.19.0-preview.202409260001

v1.19.1

v1.2.0

v1.2.1

v1.20.0

v1.20.0-preview.202410100001

v1.20.0-preview.202410180001

v1.20.0-preview.202410240001

v1.21.0

v1.21.0-preview.202411150001

v1.21.0-preview.202411220001

v1.21.0-preview.202411290003

v1.21.0-preview.202411290004

v1.22.0

v1.22.0-preview.202412120001

v1.22.0-preview.202412190001

v1.22.0-preview.202412270001

v1.22.1

v1.22.2

v1.22.3

v1.23.0

v1.23.0-preview.202501310001

v1.24.0

v1.24.0-preview.202502270001

v1.24.0-preview.202503060001

v1.24.1

v1.24.2

v1.24.3

v1.25.1

v1.25.1-preview.202504100001

v1.25.1-preview.202504170001

v1.25.1-preview.202504240001

v1.25.1-preview.202505010001

v1.26.0

v1.26.1

v1.27.0

v1.27.0-preview.202505220001

v1.27.0-preview.202505290001

v1.27.0-preview.202506050001

v1.29.0

v1.3.0

v1.30.0

v1.31.0

v1.4.0

v1.5.0

v1.5.0-preview.202307170006

v1.5.0-preview.202307200001

v1.5.0-preview.202307270001

v1.5.0-preview.202308030001

v1.5.1

v1.6.0

v1.6.0-preview.202308240001

v1.6.0-preview.202308310001

v1.6.0-preview.202309070001

v1.6.1

v1.7.0

v1.7.0-preview.202309210001

v1.7.0-preview.202309280001

v1.8.0

v1.8.0-preview.202310120001

v1.8.0-preview.202310190001

v1.8.0-preview.202310260001

v1.8.1

v1.8.2

v1.9.0-preview.202311160001

v1.9.0-preview.202311230001

v1.9.0-preview.202311300001

v1.9.1

Database specific

source

"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-59866.json"