Vulnerability in Spomky-Labs Webauthn Framwork
CVE-2026-30964
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N.
EPSS exploit prediction
EPSS: 0.002 (7.9th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 8th percentile — 7.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: -0.000
Affected products
- Spomky-Labs Webauthn Framwork
- Spomky-Labs Webauthn-Lib
- Spomky-Labs Webauthn-Symfony-Bundle
- Web-Auth Webauthn-Framework — versions < 5.2.4
- Web-Auth Webauthn-Lib — versions < 5.2.4
- Web-Auth Webauthn-Symfony-Bundle — versions < 5.2.4
Weakness classification (CWE)
References
Frequently asked questions
- What is CVE-2026-30964?
- CVE-2026-30964 is a medium-severity vulnerability in Spomky-Labs Webauthn Framwork, classified under Origin Validation Error. CVSS score: 5.4/10. Published 2026-03-10.
- How severe is CVE-2026-30964?
- Medium severity. CVSS v3 base score is 5.4 out of 10.