CVE-2026-63183: OmniAuth: Host Header Injection Vulnerability

November 9, 2026

Host header injection risk when using Omniauth with a web framework that does not verify incoming host headers. An example of a framework that provides host header validation is modern Rails when configured appropriately

References

github.com/advisories/GHSA-m27g-v28p-f9fx
github.com/omniauth/omniauth/commit/943b44faea242f063fa9230254fe7d60cfcc9c90
github.com/omniauth/omniauth/security/advisories/GHSA-m27g-v28p-f9fx
nvd.nist.gov/vuln/detail/CVE-2026-63183

Code Behaviors & Features

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