Critical severity · published Jul 16, 2026
CVE-2026-59864
Kiota: Path/URL injection into generated Copilot plugin manifest via x-ai-* extensions
9.3
CVSS
1.3%
EPSS
No
On KEV
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.
Exploitation
Is it being used?
Exploit prediction (EPSS)1.3% · higher than 71% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
KI
kiota · microsoft
>= 1.30.0, < 1.31.1; < 1.29.1 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-59864
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-59864
github.com
https://github.com/microsoft/kiota/commit/9a185994a4e549b7bba3cc2beffb9736aa902e79
github.com
https://github.com/microsoft/kiota/pull/7892
github.com
https://github.com/microsoft/kiota/releases/tag/v1.32.5
github.com
https://github.com/microsoft/kiota/security/advisories/GHSA-4jwf-m4wg-8p66
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