Origin Validation Error Affecting web-auth/webauthn-lib package, versions <5.2.4
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-PHP-WEBAUTHWEBAUTHNLIB-15460791
- published11 Mar 2026
- disclosed10 Mar 2026
- creditKen Watanabe
Introduced: 10 Mar 2026
CVE-2026-30964 (opens in a new tab)How to fix?
Upgrade web-auth/webauthn-lib to version 5.2.4 or higher.
Overview
Affected versions of this package are vulnerable to Origin Validation Error in the CheckAllowedOrigins process. An attacker can bypass strict origin validation by submitting authentication or registration responses with a manipulated origin value that matches only the host component, allowing unauthorized origins differing by scheme or port to be accepted.