Vulnerability in Esaqa Gmbh Psono
CVE-2026-117470
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:H/A:N.
EPSS exploit prediction
EPSS: 0.004 (34.9th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 35th percentile — 34.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
The 30-day trend appears once there are two daily scores.
Affected products
Weakness classification (CWE)
References
- fdf66990-8419-4c8c-8848-ec15d75773b4 (vendor-advisory)
- fdf66990-8419-4c8c-8848-ec15d75773b4 (technical-description)
- fdf66990-8419-4c8c-8848-ec15d75773b4 (patch)
- fdf66990-8419-4c8c-8848-ec15d75773b4 (release-notes)
- fdf66990-8419-4c8c-8848-ec15d75773b4 (product)
Frequently asked questions
- What is CVE-2026-117470?
- CVE-2026-117470 is a medium-severity vulnerability in Esaqa Gmbh Psono, classified under Authentication Bypass by Capture-replay. CVSS score: 6.5/10. Published 2026-10-27.
- How severe is CVE-2026-117470?
- Medium severity. CVSS v3 base score is 6.5 out of 10.