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 or shell commands, achieving code execution on the Cockpit host without valid credentials. The injection occurs during the authentication flow before any credential verification takes place, meaning no login is required to exploit the vulnerability.
Conclusion & alert: CVE-2026-4631 is rated High Exploit Risk (84.9/100): CVSS Critical severity, with high exploitation likelihood (EPSS 27.29%, 97th percentile). Core evidence: 1 public exploit reference(s) are indexed (Exploit-DB). Mandatory action: Public exploits are available—assess exposure, apply mitigations, and prioritize patching.
Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.
| EDB-ID | Source | Kind | Published | Link |
|---|---|---|---|---|
| 52572 | exploit_db | edb | 2026-05-21 | Exploit-DB ↗ |
EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).
| # | Date | Old EPSS score | New EPSS score | Delta (New - Old) |
|---|---|---|---|---|
| 1 | 2026-06-11 | 30.39% | 27.29% | -3.10% |
| 2 | 2026-06-05 | 26.51% | 30.39% | +3.88% |
| 3 | 2026-06-01 | — | 26.51% | — |
Full EPSS history (11 records total)
CVSS metrics for this CVE.
| Base score | Version | Severity | Vector | Exploitability | Impact | Score source |
|---|---|---|---|---|---|---|
| 9.8 | 3.1 | CRITICAL |
|
3.9 | 5.9 | [email protected] |
| vendor | priority | summary | link |
|---|---|---|---|
debian
|
unimportant | CVE-2026-4631 unimportant priority: Debian including 1 source packages (cockpit), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. | https://security-tracker.debian.org/tracker/CVE-2026-4631 |
redhat
|
critical | — | https://access.redhat.com/security/cve/CVE-2026-4631 |
suse
|
critical | CVE-2026-4631 severity critical: SUSE including 41 source package names (cockpit, cockpit-344-2.el9_7, …), 83 product×package rows across 10 product lines (SUSE Liberty Linux 9, SUSE Linux Enterprise Micro 5.2, … (10 product lines)): Known Not Affected 39, Fixed 31, First Fixed 13. | https://www.suse.com/security/cve/CVE-2026-4631/ |
ubuntu
|
medium | CVE-2026-4631 medium priority: Ubuntu including 1 source packages (cockpit), 6 status rows across 6 suites (bionic, focal, jammy, noble, questing, upstream): needs-triage 6. | https://ubuntu.com/security/CVE-2026-4631 |
| Vendor | Product | Version | Raw CPE |
|---|---|---|---|
| No affected products in dataset. | |||