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Vulnerability · Published Nov 3, 2026 · Assigned by GitHub_M

CVE-2026-55186Silverstripe MFA: Can bypass MFA during password reset flow

Medium 4.2

In plain English

A medium-severity authentication bypass in silverstripe-mfa from silverstripe. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 20% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)4.2Medium
Exploit odds (30 days)0.3%top 79.6% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official 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.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Packagistsilverstripe/mfa6.0.0GHSA-68wq-phq7-p2vg

Affected products (as reported)

VendorProductVersions
silverstripe silverstripe-mfa < 6.0.0

Weakness: CWE-288 · Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N

References