vulnerability in mutt email client impacting authentication method
CVE-2026-43859

3.7LOW

Key Information:

Vendor

Mutt

Status
Mutt
Vendor
CVE Published:
4 May 2026

What is CVE-2026-43859?

The Mutt email client prior to version 2.3.2 has a vulnerability where it incorrectly utilizes strfcpy in place of memcpy during the IMAP auth_cram MD5 digest process. This flaw could potentially compromise the integrity of authentication and may expose sensitive user data. It’s important for users to update to the latest version to mitigate this risk.

Affected Version(s)

mutt 0 < 2.3.2

References

https://github.com/muttmua/mutt/commit/834c5a2ed0479e51e8...

CVSS V3.1

Score:
3.7
Severity:
LOW
Confidentiality:
None
Integrity:
Low
Availability:
None
Attack Vector:
Network
Attack Complexity:
High
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.