Is CVE-2026-117470 being exploited?

No public exploit is currently tracked.

How severe is CVE-2026-117470?

CVE-2026-117470 has a CVSS v3 severity of MEDIUM (6.5).

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CVE-2026-117470

Description

Psono Server CE & EE versions 3.1.0 through 7.2.3 did not consume a stored WebAuthn challenge after assertion verification. An unauthenticated remote attacker who possessed the user's password and one captured valid WebAuthn assertion could replay that assertion with separate login tokens while the stored challenge remained unchanged, bypassing the WebAuthn second factor. The attack required capture of a valid assertion and did not itself disclose plaintext secrets.