CVE-2026-67179 PUBLISHED

Genkit improper host header validation

Assigner: cisa-cg
Reserved: 28.07.2026 Published: 11.08.2026 Updated: 11.08.2026

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.

Metrics

CVSS Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CVSS Score: 7.8

Product Status

Vendor genkit-ai
Product genkit
Versions Default: unknown
  • affected from 0 to 2026-06-18 (excl.)
  • Version 2026-06-18 is unaffected

Credits

  • George Chen

References

Problem Types

  • CWE-644 Improper Neutralization of HTTP Headers for Scripting Syntax CWE