Off-by-one Error Affecting mutt package, versions <2.2.13-1+deb13u1


Severity

Recommended
low

Based on default assessment until relevant scores are available.

Threat Intelligence

EPSS
0.26% (16th percentile)

Do your applications use this vulnerable package?

In a few clicks we can analyze your entire application and see what components are vulnerable in your application, and suggest you quick fixes.

Test your applications
  • Snyk IDSNYK-ECHOLATEST-MUTT-20675223
  • published9 Oct 2026
  • disclosed4 May 2026

Introduced: 4 May 2026

CVE-2026-43860  (opens in a new tab)
CWE-193  (opens in a new tab)

How to fix?

Upgrade Echo:latest mutt to version 2.2.13-1+deb13u1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream mutt package and not the mutt package as distributed by Echo. See How to fix? for Echo:latest relevant fixed versions and status.

mutt before 2.3.2 sometimes truncates the hash_passwd by one byte for IMAP auth_cram MD5 digest.

CVSS Base Scores

version 3.1