CVE-2026-24031 · cross-distro fix matrix

CVE-2026-24031: Dovecot SQL based authentication can be bypassed when auth_username_chars is cleared by admin. This vulnerability allows bypassing authentication for any user and user enumeration. Do not clear auth_username_chars. If this is not possible, install latest fixed version. No publicly available exploits

Affects 2 Linux releases across 2 (distro × package) combinations.

Fix per ecosystem

Each block below is a distro release where CVE-2026-24031 has a known fix. Run the listed command on that distro to remediate.

Debian trixie

Source: Debian Security Tracker

dovecot→ fixed in1:2.4.1+dfsg1-6+deb13u4urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y dovecot
```

Alpine edge

Source: Alpine secdb

dovecot→ fixed in2.4.3-r0
```
apk update && apk add --upgrade dovecot
```

Are YOU affected by CVE-2026-24031?

5-second check on your actual server. Reads /etc/os-release, uname -r, and the distro's package manager; matches against this same cross-source index live.

curl https://mindsparkstack.com/scan.sh | bash

Form-based quickscan View on NVD

Continuous monitoring beats manual checking

CVE-2026-24031dropped silently in your distro's update channel. Every new CVE is the same story. StackPatch runs the matcher hourly against all 5 sources and emails the exact remediation when something new applies to one of your servers. $99 lifetime, 50 founder seats, 30-day refund.

See StackPatch ($99 lifetime)