High severityNVD Advisory· Published Jul 16, 2026· Updated Aug 17, 2026
CVE-2026-59863
CVE-2026-59863
Description
Kiota is an OpenAPI based HTTP Client code generator. Prior to 1.29.1 and 1.32.5, Kiota honored a poisoned .kiota/workspace.json workspace configuration without validating per-client or per-plugin outputPath values during kiota client generate and kiota plugin generate, allowing a malicious repository or pull request to use absolute paths, rooted POSIX / paths, UNC \\ or // paths, Windows drive X:\ paths, or .. traversal segments to write generated client files outside the workspace root on a developer or CI host. This issue is fixed in version 1.29.1 and 1.32.5.
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Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
Microsoft.OpenApi.KiotaNuGet | >= 1.30.0, < 1.32.5 | 1.32.5 |
Microsoft.OpenApi.Kiota.BuilderNuGet | >= 1.30.0, < 1.32.5 | 1.32.5 |
Microsoft.OpenApi.KiotaNuGet | < 1.29.1 | 1.29.1 |
Microsoft.OpenApi.Kiota.BuilderNuGet | < 1.29.1 | 1.29.1 |
Affected products
1- Range: <1.29.1, <1.32.5
Patches
Vulnerability mechanics
References
6- github.com/advisories/GHSA-4rj6-vrwv-wr8mghsaADVISORY
- nvd.nist.gov/vuln/detail/CVE-2026-59863ghsaADVISORY
- github.com/microsoft/kiota/commit/4049327872db7846ace35c9003774d3e3878e4e9nvdWEB
- github.com/microsoft/kiota/pull/7885nvdWEB
- github.com/microsoft/kiota/releases/tag/v1.32.5nvdWEB
- github.com/microsoft/kiota/security/advisories/GHSA-4rj6-vrwv-wr8mnvdWEB
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