CVE-2026-67179

High

Open

TLP:CLEAR

Genkit improper host header validation

NVD CVE.org

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Description

Genkit does not properly validate host request headers. Any host on the developer's network, and any website the developer visits (via DNS rebinding), can reach POST /api/runAction on the Dev UI server (default port 4000) and execute any registered Genkit action and read the result. Fixed on 2026-06-18.

Details

CVSS Score: 7.8
EPSS Score ⓘ: 0.14%

3.6th percentile
CVSS Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Confidence: 90%
Published: Aug 11, 2026
Last Modified: Aug 17, 2026

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