CVE-2026-63183
Severity not reportedOmniAuth is a flexible authentication system utilizing Rack middleware.
OmniAuth is a flexible authentication system utilizing Rack middleware. Prior to 2.2.0, OmniAuth derives provider callback URLs from request-controlled host information when neither a fixed full_host nor framework-level incoming host validation is configured. A remote unauthenticated client can supply a forged Host header, creating a host header injection risk in applications whose web framework does not verify incoming host headers. Applications using appropriately configured Rails host authorization or a fixed full_host are not affected by this path. This issue is fixed in version 2.2.0.
Affected products
Not reported by the source (unknown — not "none").
Weakness classification (CWE)
Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.
Mitigation & advisories
No vendor advisory or patch reference tagged by NVD. Check the references below.
References
- https://github.com/omniauth/omniauth/commit/943b44faea242f063fa9230254fe7d60cfcc9c90 security-advisories@github.com
- https://github.com/omniauth/omniauth/security/advisories/GHSA-m27g-v28p-f9fx security-advisories@github.com