CVE-2026-4208: Authentication Bypass in extension "E-Mail MFA Provider" (mfa_email)

March 17, 2026 (updated March 18, 2026)

The extension fails to properly reset the generated MFA code after successful authentication. This leads to a possible MFA bypass for future login attempts by providing an empty string as MFA code to the extensions MFA provider.

References

github.com/MrSilaz/mfa_email
github.com/MrSilaz/mfa_email/commit/0bb7e85b236a5232f7b092915453dd7c3da48f12
github.com/advisories/GHSA-29r8-gvx4-r9w3
nvd.nist.gov/vuln/detail/CVE-2026-4208
typo3.org/security/advisory/typo3-ext-sa-2026-007

Code Behaviors & Features

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