Security advisoryCVE-2026-55186
MultiFactor Authentication for SilverStripe can bypass MFA during password reset flow
As published by the sources
Affected packages
- silverstripe/mfaAffected
<6.0.0Fixed in6.0.0
Derived from the fixed versions above
What to do
Upgrade silverstripe/mfa to 6.0.0 or later.
composer update silverstripe/mfa --with-dependencies
To see which version you have installed, run composer show vendor/package. Running composer audit lists the known advisories that match your installed versions.
Quoted from the original advisory
Details
Impact
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
- Advisoryhttps://github.com/advisories/GHSA-68wq-phq7-p2vg
- Webhttps://github.com/silverstripe/silverstripe-mfa/security/advisories/GHSA-68wq-phq7-p2vg
- Webhttps://github.com/silverstripe/silverstripe-mfa/releases/tag/6.0.0
- Webhttps://www.silverstripe.org/download/security-releases/cve-2026-55186
- Webhttps://github.com/FriendsOfPHP/security-advisories/blob/master/silverstripe/mfa/CVE-2026-55186.yaml