Kiota: Path traversal in generated plugin manifest static_template.file reference (percent-encoding bypass)
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- Active
- Attack complexity
- Low
- Attack requirements
- None
- Impact type
- Code execution
- Confidentiality · integrity · availability
- None · None · None
- Fix status
- Fixed
Attack profile from CVSS 4.0 · CNA. Fix status from CNA and GitHub. Impact type from CWE-829.
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.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Microsoft | kiota | 1.30.0 to before 1.34.0; before 1.29.1 | 1.34.0, 1.29.1 | Patch available | CNA |
| — | Microsoft.OpenApi.Kiota (NuGet) | 1.30.0 to before 1.34.0 | 1.34.0 | Patch available | GHSA-p5rm-jg5c-8c77 |
| — | Microsoft.OpenApi.Kiota (NuGet) | before 1.29.1 | 1.29.1 | Patch available | GHSA-p5rm-jg5c-8c77 |
- kiota VendorMicrosoft Affected 1.30.0 to before 1.34.0; before 1.29.1 Fixed in 1.34.0, 1.29.1 Patch available CNA
- Microsoft.OpenApi.Kiota (NuGet) Vendor— Affected 1.30.0 to before 1.34.0 Fixed in 1.34.0 Patch available GHSA-p5rm-jg5c-8c77
- Microsoft.OpenApi.Kiota (NuGet) Vendor— Affected before 1.29.1 Fixed in 1.29.1 Patch available GHSA-p5rm-jg5c-8c77
Remediation
- Fix · CNA kiota (microsoft) Fixed in 1.34.0, 1.29.1
- Fix · GHSA-p5rm-jg5c-8c77 Microsoft.OpenApi.Kiota (NuGet) Fixed in 1.34.0 Advisory →
- Fix · GHSA-p5rm-jg5c-8c77 Microsoft.OpenApi.Kiota (NuGet) Fixed in 1.29.1 Advisory →
Vendor assessments
Timeline
- 2026-10-02 Threatist record created from CVE-2026-73851
- 2026-10-03 Alias added: GHSA-p5rm-jg5c-8c77
- 2026-11-06 Affected versions changed · Red Hat
- 2026-11-06 CVSS score added · Red Hat
References
Other 9
- https://github.com/microsoft/kiota/security/advisories/GHSA-p5rm-jg5c-8c77
- https://github.com/microsoft/kiota/issues/7912
- https://github.com/microsoft/kiota/pull/7910
- https://github.com/microsoft/kiota/pull/7913
- https://github.com/microsoft/kiota/commit/430008e9d700b3fe80f206c672415cfbd8e830e7
- https://github.com/microsoft/kiota/commit/de3d18d9fe31ced4ac749728d3a2f94811f59268
- https://github.com/microsoft/kiota/releases/tag/v1.29.1
- https://github.com/microsoft/kiota/releases/tag/v1.34.0
- https://github.com/microsoft/kiota
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Sources
- CVE-2026-73851 · CVE Program
- CVE-2026-73851 · NVD
- FIRST EPSS
- GHSA-p5rm-jg5c-8c77 · GitHub Advisory Database · CC BY 4.0
- CVE-2026-73851 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences