CVE-2026-59866
- 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
- Published
- 2026-07-16T14:46:50Z
- Modified
- 2026-08-19T12:09:54Z
- 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 generateran 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
-
- https://github.com/microsoft/kiota/releases/tag/v1.32.5
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/59xxx/CVE-2026-59866.json
- https://github.com/microsoft/kiota/security/advisories/GHSA-4vv7-jj25-4gh6
- https://nvd.nist.gov/vuln/detail/CVE-2026-59866
- https://github.com/microsoft/kiota/commit/dc812dbbf88ef7edf53a890d36b2f9d1460e947d
- https://github.com/microsoft/kiota/pull/7884
Affected packages
Git / github.com/microsoft/kiota
Affected ranges
- Type
- GIT
- Repo
- https://github.com/microsoft/kiota
- Events
-
IntroducedIntroduced0 Unknown introduced commit / All previous commits are affectedFixedFixedFixedFixed
- Database specific
-
Show details
{ "extracted_events": [ { "introduced": "1.30.0" }, { "fixed": "1.31.1" }, { "introduced": "0" }, { "fixed": "1.29.1" } ], "source": [ "AFFECTED_FIELD", "REFERENCES" ] }
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
v1.31.1
v1.32.0
v1.32.1
v1.32.2
v1.32.3
v1.32.4
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"
vanir_signatures
[
{
"deprecated": false,
"digest": {
"line_hashes": [
"66609017551477010826143835577406265593",
"35496344713004664179944048284480170529",
"147500007851372202392601133532187874810",
"240753228186878202917022054237087631710",
"322801780681153563118919792465691120440",
"105331927903652750006918956054969541779",
"92754106178057991798446179728179208061",
"253209821667215414607528288804099395645",
"250008073155348665397373185331785853495",
"64797852886090781921647040874546962214"
],
"threshold": 0.9
},
"id": "CVE-2026-59866-0255b0db",
"signature_type": "Line",
"signature_version": "v1",
"source": "https://github.com/microsoft/kiota/commit/70cd8bcba3ff1815f93187f3eb80ef96fd194d46",
"target": {
"file": "it/java/gh/src/test/java/GHAPITest.java"
}
}
]
vanir_signatures_modified
"2026-08-19T12:09:54Z"