CVE-2026-59864CWE-22CWE-829path-traversal

CVE-2026-59864

published July 16, 2026

CVSS
9.3
EPSS
1%
Percentile
70.9
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS
9.3 · NONE
CVSS v4.0
Not supplied
EPSS
0.01331 · 70.9th percentile
Weaknesses
CWE-22 · Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal'); CWE-829 · Inclusion of Functionality from Untrusted Control Sphere
Published
2026-07-16T20:19Z
References (4)
EPSS history
Timeline
  • 16 JUL 14:45Z
    Kiota: Path/URL injection into generated Copilot plugin manifest via x-ai-* extensions
    cvelistv5