CVE-2026-30964 Webauthn Framework: allowed_origins collapses URL-like origins to host-only values, bypassing exact origin validation
Attackers can bypass WebAuthn origin validation by exploiting host-only matching, allowing unauthorized authentication if allowed_origins is configured.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2026-30964?
CVE-2026-30964 is a medium-severity vulnerability in web-auth webauthn-framework, published on 10 Mar 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
web-auth/webauthn-lib is an open source set of PHP libraries and a Symfony bundle to allow developers to integrate that authentication mechanism into their web applications. Prior to 5.2.4, when allowed_origins is configured, CheckAllowedOrigins reduces URL-like values to their host component and accepts on host match alone. This makes exact origin policies impossible to express: scheme and port differences are silently ignored. This vulnerability is fixed in 5.2.4.
Weakness: CWE-346
Which versions are affected by CVE-2026-30964?
6 open source packages ship an affected version, including web-auth/webauthn-framework, web-auth/webauthn-lib and web-auth/webauthn-symfony-bundle. It affects 3 products.
| Package | Affected | Fixed in |
|---|---|---|
web-auth/webauthn-framework Packagist | From 5.2.0 | 5.2.4 |
web-auth/webauthn-framework Packagist | From 5.2.0 | 5.2.4 |
web-auth/webauthn-lib Packagist | From 5.2.0 | 5.2.4 |
web-auth/webauthn-lib Packagist | From 5.2.0 | 5.2.4 |
web-auth/webauthn-symfony-bundle Packagist | From 5.2.0 | 5.2.4 |
web-auth/webauthn-symfony-bundle Packagist | From 5.2.0 | 5.2.4 |
Products include Spomky-Labs Webauthn-Lib, Spomky-Labs Webauthn-Symfony-Bundle, Spomky-Labs Webauthn Framwork.
How do I fix CVE-2026-30964?
Upgrade web-auth/webauthn-framework to 5.2.4 or later.
Is CVE-2026-30964 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-30964 exists.
Sources
Also known as GHSA-f7pm-6hr8-7ggm.