CVE-2026-43860
mutt: mutt: Authentication bypass due to IMAP CRAM-MD5 hash truncation
Severity
LowRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · May 4, 2026
Updated · July 2, 2026
Description
A flaw was found in mutt. During the IMAP CRAM-MD5 (Challenge-Response Authentication Mechanism - Message-Digest Algorithm 5) authentication, the password hash is truncated by one byte. This issue could allow a remote attacker to potentially bypass authentication, leading to unauthorized access.
CVSS score applicability
The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.
Mitigation
No mitigation is specified in collected source.
CVSS / CWE
CVSS 3.1 · 3.7CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N
CWE-193 · Off-by-one Error