Is CVE-2026-55186 being exploited?

No public exploit is currently tracked.

How severe is CVE-2026-55186?

CVE-2026-55186 has a CVSS v3 severity of MEDIUM (4.2).

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CVE-2026-55186

Description

Silverstripe MFA provides multi-factor authentication for Silverstripe CMS. Prior to 6.0.0, the CMS 5 password reset flow can issue a logged-in session after a user changes a password but before the user's configured multi-factor authentication challenge is completed. An attacker with access to the user's email account can follow the reset flow and bypass the additional authentication factor. CMS 6 is not affected. This issue is fixed in version 6.0.0.