CVE-2026-59864: Path Traversal

Description

Kiota is an OpenAPI based HTTP Client code generator. Prior to 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 1.32.5.

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Weakness Type (CWE)

CWE-22 Path Traversal

CWE-829 CWE-829

References

Other References

https://github.com/microsoft/kiota/commit/9a185994a4e549b7bba3cc2beffb9736aa902e79 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

Frequently Asked Questions

What is CVE-2026-59864? +

Kiota is an OpenAPI based HTTP Client code generator. Prior to 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 1.32.5.

How do I check if I'm vulnerable to CVE-2026-59864? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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