Path Traversal in Microsoft Kiota

CVE-2026-73851

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.

Vulnerability class: Path Traversal (Directory Traversal)

Published 2026-08-17 · last modified 2026-09-18.

EPSS exploit prediction

EPSS: 0.023 (82.5th percentile), scored 2026-10-02.

Low probability of exploitation in the next 30 days, but still tracked. 82nd percentile — 82.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.015 · newest: 0.023 · change: +0.008

Affected products

Microsoft Kiota — versions >= 1.30.0, < 1.34.0, < 1.29.1

Path Traversal in Microsoft Kiota

EPSS exploit prediction

Affected products

Weakness classification (CWE)

References