CVE-2026-4208
CVE-2026-4208 is a high-severity vulnerability in Mrsilaz Mfa Mail with a CVSS 3.x base score of 8.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-639.
Key facts
- Severity: High (CVSS 3.x base score 8.8)
- CVSS v4: 7.7
- EPSS exploit prediction: 0% (17th percentile)
- Actively exploited: Not listed in CISA KEV
- EU (EUVD) id: EUVD-2026-12554
- Weakness: CWE-639
- Affected product: Mrsilaz Mfa Mail
- Published:
- Last modified:
Description
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.
Frequently asked questions
- What is CVE-2026-4208?
- 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.
- How severe is CVE-2026-4208?
- CVE-2026-4208 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
- Is CVE-2026-4208 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (17th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2026-4208?
- CVE-2026-4208 primarily affects Mrsilaz Mfa Mail. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
- How do I fix CVE-2026-4208?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
- Does CVE-2026-4208 have an EU (EUVD) identifier?
- Yes. CVE-2026-4208 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-12554.
- When was CVE-2026-4208 published?
- CVE-2026-4208 was published on 2026-03-17 and last updated on 2026-06-17.
References
Affected products (2)
- cpe:2.3:a:mrsilaz:mfa_mail:*:*:*:*:*:typo3:*:*
- cpe:2.3:a:mrsilaz:mfa_mail:2.0.0:*:*:*:*:typo3:*:*
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