CVE-2026-19117: Delinea Secret Server FIDO2 credential registration authentication bypass vulnerability

Severity: critical (CVSS 9.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.5% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-09-02 · updated 2026-09-03
Weakness: CWE-290

Description

Under specific conditions, an attacker can register an attacker-controlled FIDO2 credential against a target account and then authenticate as that user. This issue affects on-premises deployments only.

Affected products

Delinea Secret Server (On-Prem): from 10.6.0 through 11.7.61; from 11.8.0 through 11.8.1; from 11.9.0 through 11.9.47; from 12.0.0 through 12.0.22; from 12.1.0 through 12.1.2

References

https://delinea.com/security-advisories

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