CVE-2009-1390: Mutt

Medium severity, CVSS 6.8. EPSS: 1.7% chance of exploitation in the next 30 days.

Mutt 1.5.19, when linked against (1) OpenSSL (mutt_ssl.c) or (2) GnuTLS (mutt_ssl_gnutls.c), allows connections when only one TLS certificate in the chain is accepted instead of verifying the entire chain, which allows remote attackers to spoof trusted servers via a man-in-the-middle attack.

Affected products

• Mutt Mutt: version 1.5.19 only

Published 2009-06-16. Last modified 2026-06-16.