Quick answers
- Is CVE-2026-117470 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-117470 being exploited in the wild.
- How severe is CVE-2026-117470?
- Medium severity, with a CVSS score of 6.5, published 27 October 2026.
- Which products and versions are affected?
- Psono Server Community Edition 3.1.0 through 7.2.3; Psono Server Enterprise Edition 3.1.0 through 7.2.3.
- Is there a fix for CVE-2026-117470?
- No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
- How is CVE-2026-117470 attacked?
- It is attacked over the network, in a software library.
- Am I affected by CVE-2026-117470?
- Check whether you run Psono Server Community Edition or Psono Server Enterprise Edition at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
Technical details
The vulnerability is a WebAuthn challenge reuse flaw in the authentication logic. An unauthenticated attacker who has obtained a user's password and captured a valid WebAuthn assertion can replay that assertion multiple times during separate login attempts, since the server does not invalidate (consume) the challenge after the first verification. This bypasses the second-factor protection, though the attack requires prior capture of a legitimate assertion and does not itself expose stored secrets.
Affected products
- Psono Server Community Edition 3.1.0 through 7.2.3
- Psono Server Enterprise Edition 3.1.0 through 7.2.3
Timeline
- 2026-10-27: disclosed