How severe is CVE-2026-67179?

CVE-2026-67179 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2026-67179 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (4th percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2026-67179?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2026-67179 published?

CVE-2026-67179 was published on 2026-08-11 and last updated on 2026-08-17.

CVE-2026-67179

CVE-2026-67179 is a high-severity vulnerability with a CVSS 3.x base score of 7.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-644.

Key facts

Severity: High (CVSS 3.x base score 7.8)
EPSS exploit prediction: 0% (4th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-644
Published: 2026-08-11
Last modified: 2026-08-17

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.

Frequently asked questions

What is CVE-2026-67179?: 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.
How severe is CVE-2026-67179?: CVE-2026-67179 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2026-67179 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (4th percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2026-67179?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2026-67179 published?: CVE-2026-67179 was published on 2026-08-11 and last updated on 2026-08-17.

References

Other CWE-644 vulnerabilities

CVE-2025-70948 — Critical (CVSS 9.3): A host header injection vulnerability in the mailer component of @perfood/couch-auth v0.26.0 allows attackers to obtain…
CVE-2026-26747 — Critical (CVSS 9.1): A Host Header Poisoning vulnerability exists in Monica 4.1.2 due to improper handling of the HTTP Host header in…
CVE-2026-26234 — High (CVSS 8.8): JUNG Smart Visu Server 1.1.1050 contains a request header manipulation vulnerability that allows unauthenticated…
CVE-2023-32465 — High (CVSS 8.8): Dell Power Protect Cyber Recovery, contains an Authentication Bypass vulnerability. An attacker could potentially…
CVE-2026-33805 — High (CVSS 8.6): @fastify/reply-from v12.6.1 and earlier and @fastify/http-proxy v11.4.3 and earlier process the client's Connection…
CVE-2025-64484 — High (CVSS 8.5): OAuth2-Proxy is an open-source tool that can act as either a standalone reverse proxy or a middleware component…

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