CVE-2026-4631 · cross-distro fix matrix

CVE-2026-4631: Cockpit's remote login feature passes user-supplied hostnames and usernames from the web interface to the SSH client without validation or sanitization. An attacker with network access to the Cockpit web service can craft a single HTTP request to the login endpoint that injects malicious SSH options

Affects 1 Linux release across 1 (distro × package) combinations.

Elevated exploitation risk

FIRST EPSS puts CVE-2026-4631's probability of exploitation in the next 30 days at 15% (96th percentile of all CVEs)— well above the noise floor. Prioritize it.

EPSS:15% · 30-day exploit probability96th percentile

Fix per ecosystem

Each block below is a distro release where CVE-2026-4631 has a known fix. Run the listed command on that distro to remediate.

Debian trixie

Source: Debian Security Tracker

cockpit→ fixed in337-1+deb13u1urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y cockpit
```

Are YOU affected by CVE-2026-4631?

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

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