Vulnerability · Published Jul 16, 2026 · Assigned by GitHub_M
CVE-2026-59863Kiota: Workspace-config poisoning: out-of-repo file write + generation-time SSRF
High 7.0
In plain English
A high-severity path traversal in kiota from microsoft. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 1.4% (higher than 72% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official 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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| NuGet | microsoft.openapi.kiota | 1.32.5 | GHSA-4rj6-vrwv-wr8m |
| NuGet | microsoft.openapi.kiota | 1.29.1 | GHSA-4rj6-vrwv-wr8m |
| NuGet | microsoft.openapi.kiota.builder | 1.32.5 | GHSA-4rj6-vrwv-wr8m |
| NuGet | microsoft.openapi.kiota.builder | 1.29.1 | GHSA-4rj6-vrwv-wr8m |
Affected products (as reported)
Weakness: CWE-22 · Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:H/VA:L/SC:N/SI:N/SA:N
References
- https://github.com/microsoft/kiota/security/advisories/GHSA-4rj6-vrwv-wr8m x_refsource_CONFIRM
- https://github.com/microsoft/kiota/pull/7885 x_refsource_MISC
- https://github.com/microsoft/kiota/commit/4049327872db7846ace35c9003774d3e3878e4e9 x_refsource_MISC
- https://github.com/microsoft/kiota/releases/tag/v1.32.5 x_refsource_MISC