CVE-2026-55186: MultiFactor Authentication for SilverStripe can bypass MFA during password reset flow
(updated )
In CMS 5, the password reset flow let a user with multi-factor authentication enabled change their password and get a logged-in session before completing multi-factor authentication. Exploiting this requires access to the user’s email account. CMS 6 is not affected.
References
- github.com/FriendsOfPHP/security-advisories/blob/master/silverstripe/mfa/CVE-2026-55186.yaml
- github.com/advisories/GHSA-68wq-phq7-p2vg
- github.com/silverstripe/silverstripe-mfa/releases/tag/6.0.0
- github.com/silverstripe/silverstripe-mfa/security/advisories/GHSA-68wq-phq7-p2vg
- nvd.nist.gov/vuln/detail/CVE-2026-55186
- www.silverstripe.org/download/security-releases/cve-2026-55186
Code Behaviors & Features
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