# OPENSUSE-SU-2026:21016-1: mutt security update

OPENSUSE-SU-2026:21016-1, released June 22, 2026, fixes 6 CVEs in mutt (version 2.2.16-160000.2.1). None of them is reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/fix/linux/opensuse-su-2026-21016-1
- Platform: Linux
- Released: Jun 22, 2026
- Priority: Routine (Closes 6 CVEs, none high severity)
- CVEs: 6, exploited: 0, on CISA KEV: 0
- Vendor advisory: https://osv.dev/vulnerability/openSUSE-SU-2026:21016-1

## Applies to

| Product | Release | Fixed in |
|---|---|---|
| [mutt](https://patchblox.com/security/data/product/linux/mutt.md) | opensuse-leap 16.0 | 2.2.16-160000.2.1 |

## CVEs this fix closes

| CVE | Priority | Title | CVSS | EPSS | Exploitation |
|---|---|---|---:|---:|---|
| [CVE-2026-43863](https://patchblox.com/security/data/cve/CVE-2026-43863.md) | Routine | mutt: mutt before 2.3.2 has an infinite loop in data_object_to_stream in crypt-gpgme.c. | 3.7 | 0.0020 |  |
| [CVE-2026-43859](https://patchblox.com/security/data/cve/CVE-2026-43859.md) | Routine | mutt: mutt before 2.3.2 sometimes uses strfcpy instead of memcpy for the IMAP auth_cram MD5 digest. | 3.7 | 0.0016 |  |
| [CVE-2026-43860](https://patchblox.com/security/data/cve/CVE-2026-43860.md) | Routine | mutt: mutt before 2.3.2 sometimes truncates the hash_passwd by one byte for IMAP auth_cram MD5 digest. | 3.7 | 0.0016 |  |
| [CVE-2026-43861](https://patchblox.com/security/data/cve/CVE-2026-43861.md) | Routine | mutt: mutt before 2.3.2 does not check for '\0' in url_pct_decode. | 3.7 | 0.0016 |  |
| [CVE-2026-43862](https://patchblox.com/security/data/cve/CVE-2026-43862.md) | Routine | mutt: In mutt before 2.3.2, the imap_auth_gss security level is mishandled. | 3.7 | 0.0016 |  |
| [CVE-2026-43864](https://patchblox.com/security/data/cve/CVE-2026-43864.md) | Routine | mutt: mutt before 2.3.2 has a show_sig_summary NULL pointer dereference. | 2.5 | 0.0010 |  |

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Data as of 2026-11-10T01:44:33Z 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 Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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