# CVE-2020-28896: mutt: Mutt is a low resource, highly configurable, text-based MIME e-mail client

CVE-2020-28896 is fixed in 2 products on 1 platform, first by mutt 1.9.4-3ubuntu0.4, released November 23, 2020. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2020-28896
- Priority: Routine
- CVSS: 6.5 (Moderate)
- EPSS: 0.0235
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Nov 23, 2020

## Description

Mutt is a low resource, highly configurable, text-based MIME e-mail client. Mutt supports most e-mail storing formats, such as mbox and Maildir, as well as most protocols, including POP3 and IMAP.  The following packages have been upgraded to a later upstream version: mutt (2.0.7). (BZ#1912614)  Security Fix(es):  * mutt: Incorrect handling of invalid initial IMAP responses could lead to an authentication attempt over unencrypted connection (CVE-2020-28896)  * mutt: Memory leak when parsing rfc822 group addresses (CVE-2021-3181)  For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.  Additional Changes:  For detailed information on changes in this release, see the Red Hat Enterprise Linux 8.5 Release Notes linked from the References section.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | mutt RHEL 8 | 5:2.0.7-1.el8 | [RHSA-2021:4181](https://patchblox.com/security/data/fix/linux/rhsa-2021-4181.md) | Nov 9, 2021 |
| Linux | mutt Ubuntu 18.04.6 LTS (bionic) | 1.9.4-3ubuntu0.4 | [mutt 1.9.4-3ubuntu0.4](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-mutt-1.9.4-3ubuntu0.4.md) | Nov 23, 2020 |
| Linux | mutt Ubuntu 20.04 LTS (focal) | 1.13.2-1ubuntu0.3 | [mutt 1.13.2-1ubuntu0.3](https://patchblox.com/security/data/fix/linux/ubuntu-focal-mutt-1.13.2-1ubuntu0.3.md) | Nov 23, 2020 |
| Linux | mutt almalinux 8 | 5:2.0.7-1.el8 | [ALSA-2021:4181](https://patchblox.com/security/data/fix/linux/alsa-2021-4181.md) | Nov 9, 2021 |
| Linux | mutt ol 8 | 5:2.0.7-1.el8 | [ELSA-2021-4181](https://patchblox.com/security/data/fix/linux/elsa-2021-4181.md) | Nov 16, 2021 |
| Linux | mutt rocky 8 | 5:2.0.7-1.el8 | [RLSA-2021:4181](https://patchblox.com/security/data/fix/linux/rlsa-2021-4181.md) | Nov 9, 2021 |
| Linux | neomutt Ubuntu 18.04.6 LTS (bionic) | 20171215+dfsg.1-1ubuntu0.1~esm1 | [neomutt 20171215+dfsg.1-1ubuntu0.1~esm1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-neomutt-20171215-dfsg.1-1ubuntu0.1-esm1.md) | Apr 14, 2022 |
| Linux | neomutt Ubuntu 20.04 LTS (focal) | 20191207+dfsg.1-1.1ubuntu0.1~esm1 | [neomutt 20191207+dfsg.1-1.1ubuntu0.1~esm1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-neomutt-20191207-dfsg.1-1.1ubuntu0.1-esm1.md) | Nov 11, 2024 |

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Data as of 2026-11-08T00:53:09Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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