CVE-2026-30964: Webauthn Framework: allowed_origins collapses URL-like origins to host-only values, bypassing exact origin validation

March 10, 2026

When allowed_origins is configured, CheckAllowedOrigins reduces URL-like values to their host and accepts on host match. This makes exact origin policies impossible to express: scheme and port differences are lost for URL-like entries.

References

github.com/advisories/GHSA-f7pm-6hr8-7ggm
github.com/web-auth/webauthn-framework
github.com/web-auth/webauthn-framework/commit/535cc3c2dcbd9c3dfd5e00a254ad4a984e5e7839
github.com/web-auth/webauthn-framework/security/advisories/GHSA-f7pm-6hr8-7ggm
nvd.nist.gov/vuln/detail/CVE-2026-30964

Code Behaviors & Features

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