Vulnerability Description
Kiota is an OpenAPI based HTTP Client code generator. Prior to 1.29.1 and 1.32.5, `kiota plugin add` and `kiota plugin generate` (with `-t APIPlugin`) emitted attacker-controlled static_template.file values from x-ai-adaptive-card and x-ai-capabilities into generated Microsoft 365 Copilot and Teams plugin manifests without path validation, allowing ../, absolute, rooted, UNC, Windows drive, or URI paths in response_semantics.static_template.file to cause path traversal or out-of-package file inclusion when the generated plugin was deployed. This issue is fixed in version 1.29.1 and 1.32.5.
Related Weaknesses (CWE)
References
- https://github.com/microsoft/kiota/commit/9a185994a4e549b7bba3cc2beffb9736aa902e
- https://github.com/microsoft/kiota/pull/7892
- https://github.com/microsoft/kiota/releases/tag/v1.32.5
- https://github.com/microsoft/kiota/security/advisories/GHSA-4jwf-m4wg-8p66
FAQ
What is CVE-2026-59864?
CVE-2026-59864 is a documented vulnerability. Kiota is an OpenAPI based HTTP Client code generator. Prior to 1.29.1 and 1.32.5, `kiota plugin add` and `kiota plugin generate` (with `-t APIPlugin`) emitted attacker-controlled static_template.file ...
How severe is CVE-2026-59864?
CVSS scoring is not yet available for CVE-2026-59864. Check NVD for updates.
Is there a patch for CVE-2026-59864?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.