CVE-2024-49393: In neomutt and mutt, the To and Cc email headers are not validated by cryptographic signing which allows an at

Routine

MEDIUM 6.5REMOTEWATCHLISTMITIGATEMITIGATEMITIGATE

CVE-2024-49393 is a medium-severity flaw (CVSS 6.5) affecting mutt, neomutt, enterprise linux. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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.

Why this priority

Remotely exploitable, no login, no user action
On your watchlist

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	6.5 (Medium)
Attack vector	Network (remote)
Attack complexity	High
Privileges needed	None
User interaction	None
EPSS exploit chance	0.3% (top 74%)
CISA exploited list	No
Weakness	CWE-347
Published	2024-11-12
Last modified	2026-06-26

Publisher (CNA): Red Hat, Inc. · Vendor: mutt · neomutt · redhat

Last updated 2026-06-26 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2024-11-12 02:15 UTCPublished CVE record published
2026-06-26 02:16 UTCUpdated Record last modified

mutt mutt MITIGATE

Affected: all versions

Fixed in: no fixed release known

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy mutt || rpm -q mutt || mutt --version

No fixed or unaffected release known

Apply the vendor mitigation from the advisory, disable the affected feature, or restrict network access.

neomutt neomutt MITIGATE

Affected: all versions

Fixed in: no fixed release known

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy neomutt || rpm -q neomutt || neomutt --version

No fixed or unaffected release known

Apply the vendor mitigation from the advisory, disable the affected feature, or restrict network access.

redhat enterprise linux MITIGATE

Affected: 8.0 · 9.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 8.0

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2024-49393?

mutt: mitigate or apply the listed mitigation; neomutt: mitigate or apply the listed mitigation; enterprise linux: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2024-49393 being exploited?

CVE-2024-49393 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2024-49393 affect?

CVE-2024-49393 affects mutt, neomutt, enterprise linux. Severity is medium (CVSS 6.5). 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 confid

How urgent is CVE-2024-49393?

Priority 39/100. Remotely exploitable, no login, no user action; On your watchlist

Related CVEs

CVE-2024-49395 MEDIUM 5.3 MITIGATE MITIGATE In mutt and neomutt, PGP encryption does not use the --hidden-recipient mode which may leak the Bcc email head
CVE-2024-49394 MEDIUM 5.3 MITIGATE MITIGATE In mutt and neomutt the In-Reply-To email header field is not protected by cryptographic signing which allows

References

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