CVEvulnerability
CVE-2026-117470
6.5 MEDIUM
Official page ↗
- Status
- Deferred
- Published
- 2026-10-27
- Last modified
- 2026-10-27
- Assigner
- fdf66990-8419-4c8c-8848-ec15d75773b4
- CVSS 3.1 (fdf66990-8419-4c8c-8848-ec15d75773b4)
- 6.5 MEDIUM — CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:H/A:N
- Weaknesses
- CWE-294
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.
Related
Weakness · CWE (1)
- CWE-294 Authentication Bypass by Capture-replay weakness
References
- https://gitlab.com/esaqa/esaqa/security-advisories/-/blob/master/advisories/CVE-2026-117470.md gitlab.com
- https://gitlab.com/esaqa/psono/psono-server gitlab.com
- https://gitlab.com/esaqa/psono/psono-server/-/blob/v7.2.3/psono/restapi/serializers/webauthn_verify.py gitlab.com
- https://gitlab.com/esaqa/psono/psono-server/-/commit/9c9a7f1701535df63370340dcc80210737dc495d gitlab.com
- https://gitlab.com/esaqa/psono/psono-server/-/releases/v7.2.4 gitlab.com