Path Traversal in Microsoft Kiota
CVE-2026-59867
Kiota is an OpenAPI based HTTP Client code generator. Prior to 1.29.1 and 1.32.5, Kiota resolved OpenAPI $ref values by fetching remote http(s) URLs and reading local absolute or out-of-tree file paths, allowing `kiota generate` on an attacker-controlled or attacker-influenced description to perform build-time SSRF, remote file inclusion, and local file inclusion by inlining external schemas such as REMOTE_KIOTA_PROP or Leaked into generated clients. This issue is fixed in version 1.29.1 and 1.32.5 by AllowedExternalOriginsStreamLoader and the --allowed-external-origins option.
Vulnerability class: Path Traversal (Directory Traversal)
EPSS: 0.024 (82.7th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.1 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:L/A:N.
Affected products
- Microsoft Kiota — versions >= 1.30.0, < 1.31.1, < 1.29.1, < 1.32.5
Weakness classification (CWE)
References
- security-advisories@github.com (x_refsource_CONFIRM)
- security-advisories@github.com (x_refsource_MISC)
- security-advisories@github.com (x_refsource_MISC)
- security-advisories@github.com (x_refsource_MISC)
Frequently asked questions
- What is CVE-2026-59867?
- CVE-2026-59867 is a high-severity vulnerability in Microsoft Kiota, classified under Path Traversal. CVSS score: 7.1/10. Published 2026-07-16.
- How severe is CVE-2026-59867?
- High severity. CVSS v3 base score is 7.1 out of 10.