# CVE-2026-117470: Psono Server WebAuthn assertion replay in authentication

Source: https://junglewise.ai/threats/cve-2026-117470-psono-server-ce-ee-versions-3-1-0-through-7-2-3-did-not-consume  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-10-27. Updated: 2026-10-27  
License: CC BY 4.0 with a link back

CVE-2026-117470 · Severity: medium · CVSS 6.5 · Published 2026-10-27

Psono Server is a password management platform that stores and protects sensitive credentials. Versions 3.1.0 through 7.2.3 fail to properly invalidate WebAuthn security keys after use, allowing an attacker who knows a user's password to reuse a captured security key assertion to bypass the second-factor authentication and gain account access.

Technologies: [Psono Server Community Edition](https://junglewise.ai/threats/technologies/server-community-edition), [Psono Server Enterprise Edition](https://junglewise.ai/threats/technologies/server-enterprise-edition). Vendors: [Psono](https://junglewise.ai/threats/vendors/psono).

## 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

## References

- [https://gitlab.com/esaqa/esaqa/security-advisories/-/blob/master/advisories/CVE-2026-117470.md](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)

## Related threats

- [Psono Server SSRF via user-controlled Duo host parameter](https://junglewise.ai/threats/cve-2026-117471-psono-server-ce-ee-versions-0-1-0-through-7-2-3-accepted-a-user)
- [Psono Server file-transfer credential direction enforcement flaw](https://junglewise.ai/threats/cve-2026-117469-psono-server-ce-ee-versions-1-0-0-through-7-2-3-did-not-enforce)