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Vulnerabilities CVE-2026-59864

CVE-2026-59864

Critical
Open
TLP:CLEAR

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

NVD CVE.org
Critical Infrastructure

AI Analysis

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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.

Details

CVSS Score
9.3
EPSS Score
1.28%

67.5th percentile

CVSS Vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Confidence
90%
Published
Jul 16, 2026
Last Modified
Aug 17, 2026
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