CVE-2026-67179

HIGH 7.8

Genkit improper host header validation

CVSS Score

7.8

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-644
Vendor	genkit-ai
Product	genkit
Published	Aug 11, 2026

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CVSS v3 Breakdown

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

Attack Vector

Local

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Affected Versions

genkit-ai / genkit

0 < 2026-06-18

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/genkit-ai/genkit/issues/5581 github.com: https://github.com/genkit-ai/genkit/pull/5587 cve.org: https://www.cve.org/CVERecord?id=CVE-2026-67179 raw.githubusercontent.com: https://raw.githubusercontent.com/cisagov/CSAF/develop/csaf_files/IT/white/2026/va-26-223-01.json

Credits

George Chen