CVE-2026-4208
Authentication Bypass in extension "E-Mail MFA Provider" (mfa_email)
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.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- High
- Privileges needed
- Low
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- High
Exploit likelihood
What each source reports
CVE List Score used
Authentication Bypass in extension "E-Mail MFA Provider" (mfa_email)
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.
- Record
CVE-2026-4208- CVSS 4.0
- 7.7 High
CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N - Weakness
- CWE-639
- Updated
- 2026-11-02
EUVDEUVD-2026-12554
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.
- Record
EUVD-2026-12554- CVSS 4.0
- 7.7 High
CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N - Updated
- 2026-11-02
GitHub AdvisoriesGHSA-29r8-gvx4-r9w3
Authentication Bypass in extension "E-Mail MFA Provider" (mfa_email)
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.
- Record
GHSA-29r8-gvx4-r9w3- CVSS 4.0
- 7.7 High
CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N - CVSS 3.1
- 8.8 High
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-639
- Updated
- 2026-11-02
NVD
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.
- Record
CVE-2026-4208- CVSS 4.0
- 7.7 High
CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X - CVSS 3.1
- 8.8 High
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-639
- Updated
- 2026-11-02
OSV
Authentication Bypass in extension "E-Mail MFA Provider" (mfa_email)
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.
- Record
CVE-2026-4208- CVSS 4.0
- 7.7 High
CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N - Weakness
- CWE-639
- Updated
- 2026-11-02
OSVGHSA-29r8-gvx4-r9w3
Authentication Bypass in extension "E-Mail MFA Provider" (mfa_email)
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.
- Record
GHSA-29r8-gvx4-r9w3- CVSS 4.0
- 7.7 High
CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N - CVSS 3.1
- 8.8 High
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-639
- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
ralffreit/mfa-emailPackagist |
before 1.0.7 | 1.0.7 |
ralffreit/mfa-emailPackagist |
2.0.0 to 2.0.0 | 2.0.1 |
ralffreit/mfa-emailPackagist |
before 1.0.7, plus listed versions 1.0.01.0.11.0.21.0.31.0.41.0.5 |
1.0.7 |
ralffreit/mfa-emailPackagist |
2.0.0 up to 2.0.1 | 2.0.1 |
History
| Recorded | Changed | Sources |
|---|---|---|
| first indexed | CVE List, EUVD, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2026-4208 is a high vulnerability (CVSS 7.7) in Typo3 Extension "e-mail Mfa Provider", published March 17, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.27%, the 19th percentile. Fixed in ralffreit/mfa-email 1.0.7.
References
typo3.org/security/advisory/typo3-ext-sa-2026-007
nvd.nist.gov/vuln/detail/CVE-2026-4208
github.com/MrSilaz/mfa_email/commit/0bb7e85b236a5232f7b092915453dd7c3da48f12
packagist.org