CVE-2026-42167 · cross-distro fix matrix

CVE-2026-42167: mod_sql in ProFTPD before 1.3.9a allows remote attackers to execute arbitrary code via a username, in scenarios where there is logging of USER requests with an expansion such as %U, and the SQL backen

Affects 3 Linux releases across 3 (distro × package) combinations. First disclosed: 2026-04-28.

CVSS v3:HIGH · 8.1(NVD-published)

Fix per ecosystem

Each block below is a distro release where CVE-2026-42167 has a known fix. Run the listed command on that distro to remediate.

Debian bookworm

Source: Debian Security Tracker

proftpd-dfsg→ fixed in1.3.8+dfsg-4+deb12u5urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y proftpd-dfsg
```

Debian trixie

Source: Debian Security Tracker

proftpd-dfsg→ fixed in1.3.8.c+dfsg-4+deb13u2urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y proftpd-dfsg
```

Alpine edge

Source: Alpine secdb

proftpd→ fixed in1.3.9a-r0
```
apk update && apk add --upgrade proftpd
```

Are YOU affected by CVE-2026-42167?

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-2026-42167dropped 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. From $9/mo, 14-day free trial, cancel anytime.

See StackPatch (from $9/mo)