Is CVE-2026-30964 actively exploited?

No active exploitation of CVE-2026-30964 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-30964 be exploited remotely?

Yes. CVE-2026-30964 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-30964?

CVE-2026-30964 has a CVSS score of 5.4 (MEDIUM).

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MEDIUM

CVE-2026-30964

CWE-346Published: March 10, 2026· Updated: Mar 11, 2026

5.4

CVSS v3.1

EPSS:0.02%probability of exploitation in 30 daysPercentile:3.7th

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.

NVD Source

Technical Analysis

CVE-2026-30964 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation does not require any privileges, though user interaction (Required) is needed, which slightly reduces the risk of mass automated attacks.