CVE-2024-49393: Mutt: neomutt: to and cc email header fields are not protected by cryptographic signing

Severity: medium (CVSS 6.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2024-11-12 · updated 2026-06-26
Weakness: CWE-347

Description

In neomutt and mutt, the To and Cc email headers are not validated by cryptographic signing which allows an attacker that intercepts a message to change their value and include himself as a one of the recipients to compromise message confidentiality.

Affected products

mutt: all versions
Neomutt: all versions
Red Hat Enterprise Linux: 8.0, 9.0

References

https://access.redhat.com/security/cve/CVE-2024-49393
https://bugzilla.redhat.com/show_bug.cgi?id=2325317
https://github.com/neomutt/neomutt/issues/4223
https://github.com/neomutt/neomutt/pull/4221
https://github.com/neomutt/neomutt/pull/4227

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