PatchTheCVECVE-2026-4208: The extension fails to properly reset the generated MFA code after successful authentication
CVE-2026-4208 is a high-severity flaw (CVSS 8.8) affecting mfa mail. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
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.
Why this priority
- High severity
A fixed release or distro patch exists.
Risk facts
| CVSS score | 8.8 (High) |
| Attack vector | Network (remote) |
| Attack complexity | Low |
| Privileges needed | Low |
| User interaction | None |
| EPSS exploit chance | 0.3% (top 81%) |
| CISA exploited list | No |
| Weakness | CWE-639 |
| Published | 2026-03-17 |
| Last modified | 2026-06-17 |
Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Am I affected?
Timeline
- Published CVE record published
- Updated Record last modified
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Quick answers
How do I fix CVE-2026-4208?
mfa mail: upgrade to 1.0.7. Exact commands for each OS are on this page.
Is CVE-2026-4208 being exploited?
CVE-2026-4208 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.
What does CVE-2026-4208 affect?
CVE-2026-4208 affects mfa mail. Severity is high (CVSS 8.8). 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 urgent is CVE-2026-4208?
Priority 35/100. High severity