medium4.2
CVE-2026-55186
MultiFactor Authentication for SilverStripe can bypass MFA during password reset flow
Impact
### 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.
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| composer | silverstripe/mfa | < 6.0.0 | 6.0.0 |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://github.com/advisories/GHSA-68wq-phq7-p2vg
- https://github.com/silverstripe/silverstripe-mfa/security/advisories/GHSA-68wq-phq7-p2vg
- https://github.com/silverstripe/silverstripe-mfa/releases/tag/6.0.0
- https://www.silverstripe.org/download/security-releases/cve-2026-55186