# Webauthn has a User Verification Downgrade via Default-Open ClientOverridePolicy

Source: https://junglewise.ai/threats/webauthn-has-a-user-verification-downgrade-via-default-open-b674f344  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-05-07  
License: CC BY 4.0 with a link back

Severity: low · CVSS 3.1 · Published 2026-05-07

Webauthn has a User Verification Downgrade via Default-Open ClientOverridePolicy

Technologies: [web-auth/webauthn-framework (Packagist)](https://junglewise.ai/threats/technologies/web-auth-webauthn-framework). Vendors: [Packagist](https://junglewise.ai/threats/vendors/packagist).

## Quick answers

**Is This vulnerability exploited in the wild?** No. Junglewise Threat Intelligence has no report of This vulnerability being exploited in the wild.

**How severe is This vulnerability?** Low severity, with a CVSS score of 3.1, published 7 May 2026.

**Which products and versions are affected?** web-auth/webauthn-framework (Packagist) ECOSYSTEM:introduced=5.3.0,fixed=5.3.1.

**Is there a fix for This vulnerability?** Yes. web-auth/webauthn-framework (Packagist): upgrade to 5.3.1 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**Am I affected?** Check whether you run web-auth/webauthn-framework (Packagist) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## How to fix

- web-auth/webauthn-framework (Packagist): upgrade to 5.3.1 or later

  ```sh
  composer require web-auth/webauthn-framework:^5.3.1
  ```


## Affected products

- web-auth/webauthn-framework (Packagist) ECOSYSTEM:introduced=5.3.0,fixed=5.3.1

## Related threats

- [Webauthn Framework: allowed_origins collapses URL-like origins to host-only values, bypassing exact origin validation](https://junglewise.ai/threats/cve-2026-30964-webauthn-framework-allowed-origins-collapses-url-like-origins-to)
- [The FIDO2/Webauthn Support for PHP library allows enumeration of valid usernames](https://junglewise.ai/threats/cve-2024-39912-the-fido2-webauthn-support-for-php-library-allows-enumeration-of)
- [Improper Access Control in Webauthn Framework](https://junglewise.ai/threats/cve-2021-38299-improper-access-control-in-webauthn-framework)