In mutt before 2.3.2, the imap_auth_gss security level is mishandled. (CVE-2026-43862)
Description
A vulnerability in mutt before version 2.3.2 involves mishandling of the imap_auth_gss security level. This issue has a medium severity rating with a CVSS score of 3.7. It affects multiple specific versions of mutt, including various Ubuntu package versions. No known exploits are reported in the wild.
CVSS v3.1
Score 3.7low
Affected software
pkg:deb/ubuntu/mutt?arch=source&distro=esm-infra/xenialpkg:deb/ubuntu/mutt?arch=source&distro=esm-infra/bionicpkg:deb/ubuntu/mutt?arch=source&distro=focalpkg:deb/ubuntu/mutt?arch=source&distro=jammypkg:deb/ubuntu/mutt?arch=source&distro=noblepkg:deb/ubuntu/mutt?arch=source&distro=questingpkg:deb/ubuntu/mutt?arch=source&distro=stonkingpkg:deb/ubuntu/mutt?arch=source&distro=resoluteRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
In mutt versions prior to 2.3.2, the imap_auth_gss security level is mishandled, potentially leading to a security weakness. The CVSS 3.1 base score is 3.7, indicating a medium severity issue with network attack vector, high attack complexity, no privileges required, no user interaction, and limited impact on integrity only. The vulnerability affects a range of specific mutt versions, many of which are Ubuntu package releases. No exploit code or active exploitation has been reported.
Potential Impact
The vulnerability could allow an attacker to impact the integrity of the system or data due to improper handling of the imap_auth_gss security level. There is no impact on confidentiality or availability. The attack complexity is high, and no privileges or user interaction are required. No known active exploitation has been reported.
Mitigation Recommendations
No explicit patch or remediation details are provided in the input data. Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Users should upgrade to mutt version 2.3.2 or later when available to address this issue.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- UBUNTU-CVE-2026-43862
- Osv Schema Version
- 1.7.0
- Ecosystems
- ["Ubuntu:Pro:16.04:LTS","Ubuntu:Pro:18.04:LTS","Ubuntu:20.04:LTS","Ubuntu:22.04:LTS","Ubuntu:24.04:LTS","Ubuntu:25.10","Ubuntu:26.10","Ubuntu:26.04:LTS"]
- Cvss Version
- 3.1
Threat ID: 6ad3f67b2cdf04f6566668f6
Added to database: 10/17/2026, 22:28:11 UTC
Last enriched: 10/18/2026, 01:37:01 UTC
Last updated: 10/18/2026, 01:37:01 UTC
Views: 4
Community Reviews
0 reviewsCrowdsource mitigation strategies, share intel context, and vote on the most helpful responses. Sign in to add your voice and help keep defenders ahead.
Want to contribute mitigation steps or threat intel context? Sign in or create an account to join the community discussion.
Actions
Updates to AI analysis require Pro Console access. Upgrade inside Console → Billing.
Need more coverage?
Upgrade to Pro Console for AI refresh and higher limits.
For incident response and remediation, OffSeq services can help resolve threats faster.
Latest Threats
Check if your credentials are on the dark web
Instant breach scanning across billions of leaked records. Free tier available.