CVE-2026-4208 json
Authentication Bypass in extension "E-Mail MFA Provider" (mfa_email)
published 2026-03-17 7 mo ago modified 2026-06-17 4 mo ago also GHSA-29r8-gvx4-r9w3 , EUVD-2026-12554
- cvss
- 8.8
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.3%
- EPSS 0.3% chance of exploitation in 30 days, percentile 19%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- packagist ralffreit/mfa-email 1.0.7, 2.0.1
- mrsilaz mfa_mail 1.0.7
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- total
- Assessed
- 7 mo ago
Exploit prediction
0.27% chance of exploitation in the next 30 days, higher than 19% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 4.0 | 7.7 | 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 |
| CNA | 4.0 | 7.7 | 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 |
| NVD | 3.1 | 8.8 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| GitHub | 3.1 | 8.8 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| packagist | ralffreit/mfa-email | <1.0.7 >=2.0.0, <2.0.1 |
1.0.7 2.0.1 |
Affected products
- TYPO3 Extension "E-Mail MFA Provider"
Classification
- Weakness
-
- CWE-639 Authorization Bypass Through User-Controlled Key
References
-
github.com
/MrSilaz/mfa_email/commit/0bb7e85b236a5232f7b092915453dd7c3da48f12
web
-
typo3.org
/security/advisory/typo3-ext-sa-2026-007
web, vendor-advisory
-
nvd.nist.gov
/vuln/detail/CVE-2026-4208
advisory
-
github.com
/MrSilaz/mfa_email
package
-
github.com
/MrSilaz/mfa_email/releases/tag/v1.0.7
web
-
github.com
/MrSilaz/mfa_email/releases/tag/v2.0.1
web
Sources
- CVE List CVE-2026-4208
- GitHub Advisory GHSA-29r8-gvx4-r9w3
- NVD CVE-2026-4208
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