ZDF
Sign inSign up

Vulnerabilities

Vulnerability · CVE-2026-4208

The extension fails to properly reset the generated MFA code after successful authentication.

Published Mar 17, 2026 · catalog updated Jun 17, 2026 · mfa mail

Check if you run it

No confirmed exploitation is on record for CVE-2026-4208. EPSS is 0.47%. Act only if a listed version of mfa mail is installed.

Gaps on this record

  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
High7.7
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.47%
Remediation
Advisory link
Affected products
cpe mrsilaz/mfa mail

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.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • cpe mrsilaz/mfa mail2.0.0

How to fix CVE-2026-4208

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2026-4208. EPSS is 0.47%. Act only if a listed version of mfa mail is installed.

Which versions are affected?

Compare what you have installed with mrsilaz/mfa mail 2.0.0. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

CWE-639: Authorization Bypass Through User-Controlled Key. EPSS 0.47%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Mar 17, 2026 · NIST NVD

    Detected

    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.

  2. Jun 17, 2026 · NIST NVD

    Updated

    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.

Sources

  • CVE.orgVulnerability recordCVE-2026-4208

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2026-4208

    30-day exploitation probability 0.5%

    first.org
  • NIST NVDVulnerability recordCVE-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.

    nvd.nist.gov

References

Freshness

Last verified in this catalog Oct 18, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.