CVE-2026-117470
Psono Server CE & EE versions 3.1.0 through 7.2.3 did not consume a stored WebAuthn challenge after…
- Risk score
- 46/100
- CVSS
- 6.5 v3.1
- Exploit chance (30 days)
- 0.4%
- Published
- 27 Oct 2026
Open in the live forecast Today's forecast
What to know
- What it is
- 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 re…
- Affected
- See advisory
- Fix
- Apply the vendor's security update; see the linked advisory.
- Exploitation
- No known exploitation
Why it is Yellow
- CVSS 6.5 medium
References
- https://gitlab.com/esaqa/esaqa/security-advisories/-/blob/master/advisories/CVE-2026-117470.md
- https://gitlab.com/esaqa/psono/psono-server
- https://gitlab.com/esaqa/psono/psono-server/-/blob/v7.2.3/psono/restapi/serializers/webauthn_verify.py
- https://gitlab.com/esaqa/psono/psono-server/-/commit/9c9a7f1701535df63370340dcc80210737dc495d
- https://gitlab.com/esaqa/psono/psono-server/-/releases/v7.2.4
Original 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.
Last activity 27 Oct 2026. Patch Forecast updates every hour.