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CVE-2026-73851
Published:August 17, 2026
Updated:August 31, 2026
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.
Affected Packages
https://github.com/microsoft/kiota.git (GITHUB):
Affected version(s) >=v1.30.0 <v1.34.0
Fix Suggestion:
Update to version v1.34.0
https://github.com/microsoft/kiota.git (GITHUB):
Affected version(s) >=v0.0.1 <v1.29.1
Fix Suggestion:
Update to version v1.29.1
microsoft.openapi.kiota (NUGET):
Affected version(s) >=1.30.0 <1.34.0
Fix Suggestion:
Update to version 1.34.0
microsoft.openapi.kiota (NUGET):
Affected version(s) >=0.1.0-preview <1.29.1
Fix Suggestion:
Update to version 1.29.1
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CVSS v4
Base Score:
6.1
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
ACTIVE
Vulnerable System Confidentiality
NONE
Vulnerable System Integrity
NONE
Vulnerable System Availability
NONE
Subsequent System Confidentiality
HIGH
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
7.4
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality
HIGH
Integrity
NONE
Availability
NONE
Weakness Type (CWE)
Inclusion of Functionality from Untrusted Control Sphere
Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
EPSS
Base Score:
1.48