What’s Vulnerable › Vulnerabilities

CVE-2026-59864: Kiota: Path/URL injection into generated Copilot plugin manifest via x-ai-* extensions

• Severity: critical (CVSS 9.3 v4.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-07-16 · updated 2026-10-24
• Weakness: CWE-22

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.

Affected products

• microsoft kiota: from 1.30.0, < 1.31.1; before 1.29.1

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

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