Memory Leak Affecting mutt package, versions <2.0.5-1


Severity

Recommended
0.0
medium
0
10

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Threat Intelligence

EPSS
2.8% (85th percentile)

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  • Snyk IDSNYK-ECHOLATEST-MUTT-20675195
  • published9 Oct 2026
  • disclosed19 Jan 2021

Introduced: 19 Jan 2021

CVE-2021-3181  (opens in a new tab)
CWE-401  (opens in a new tab)

How to fix?

Upgrade Echo:latest mutt to version 2.0.5-1 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.

rfc822.c in Mutt through 2.0.4 allows remote attackers to cause a denial of service (mailbox unavailability) by sending email messages with sequences of semicolon characters in RFC822 address fields (aka terminators of empty groups). A small email message from the attacker can cause large memory consumption, and the victim may then be unable to see email messages from other persons.

CVSS Base Scores

version 3.1