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CVE-2026-43859VulnerabilityPublished Updated

SUSE mutt · Security update for mutt

Affects SUSE muttSource GCVE Database

0

Mentioned vulnerabilities

Not known to be exploited.

Data as of 26 Oct 2026, 12:55 UTC

Severity
Medium

Rated by Threat Radar · No CVSS score from NVD or the CNA

EPSS
0.1% chance of exploitation in 30 days – higher than 5% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 8 Jun 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponised: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.

What to do

Affected software

ProductAffectedFixed in
Ubuntu 26.10muttpkg:deb/ubuntu/mutt?arch=source&distro=stonkingOther threatsAffected
  • 2.2.13-1build2 – 2.4.1-1
4 affected builds
Fixed in–
Ubuntu 26.04 LTSmuttpkg:deb/ubuntu/mutt?arch=source&distro=resoluteOther threatsAffected
  • =2.2.13-1
  • =2.2.13-1build1
  • =2.2.13-1build2
Fixed in–
Ubuntu 25.10muttpkg:deb/ubuntu/mutt?arch=source&distro=questingOther threatsAffected
  • =2.2.13-1
Fixed in–
Ubuntu 24.04 LTSmuttpkg:deb/ubuntu/mutt?arch=source&distro=nobleOther threatsAffected
  • 2.2.9-1 – 2.2.12-0.1build4
6 affected builds
Fixed in–
Ubuntu 22.04 LTSmuttpkg:deb/ubuntu/mutt?arch=source&distro=jammyOther threatsAffected
  • 2.0.5-4.1build1 – 2.1.4-1ubuntu1.2
6 affected builds
Fixed in–
Ubuntu 20.04 LTSmuttpkg:deb/ubuntu/mutt?arch=source&distro=focalOther threatsAffected
  • 1.10.1-2.1 – 1.13.2-1ubuntu0.6
11 affected builds
Fixed in–

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

Description

This update for mutt fixes the following issues - CVE-2026-43859: `strfcpy` used instead of `memcpy` for the IMAP `auth_cram` MD5 digest (bsc#1263897). - CVE-2026-43860: truncation of `hash_passwd` by one byte for IMAP `auth_cram` MD5 digest (bsc#1263896). - CVE-2026-43861: missing check for `\0` in `url_pct_decode` (bsc#1263895). - CVE-2026-43862: mishandling of the `imap_auth_gss` security level (bsc#1263894). - CVE-2026-43863: infinite loop in `data_object_to_stream` in `crypt-gpgme.c` (bsc#1263893). - CVE-2026-43864: NULL pointer dereference in function `show_sig_summary` (bsc#1263892).

References

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