CVE-2026-4631
Cockpit: cockpit: unauthenticated remote code execution due to ssh command-line argument injection
Description
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.
INFO
Published Date :
April 7, 2026, 5:16 p.m.
Last Modified :
April 10, 2026, 9:16 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
Affected Products
The following products are affected by CVE-2026-4631
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | CRITICAL | 53f830b8-0a3f-465b-8143-3b8a9948e749 | ||||
| CVSS 3.1 | CRITICAL | [email protected] |
Solution
- Validate hostnames and usernames server-side.
- Sanitize all user-supplied inputs.
- Update Cockpit to the latest version.
- Restrict access to the Cockpit web service.
Public PoC/Exploit Available at Github
CVE-2026-4631 has a 2 public
PoC/Exploit available at Github.
Go to the Public Exploits tab to see the list.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-4631.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-4631 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-4631
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Cockpit: Unauthenticated Remote Code Execution via SSH Command-Line Argument Injection
Python
📡 PoC auto collect from GitHub. ⚠️ Be careful Malware.
security cve exploit poc vulnerability
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-4631 vulnerability anywhere in the article.
-
Daily CyberSecurity
Root Access via Admin: The 9.9 RCE Crisis Threatening Cisco ISE Networks
Cisco has issued an urgent security advisory following the discovery of high-stakes vulnerabilities in its Identity Services Engine (ISE) and Passive Identity Connector (ISE-PIC) platforms. The most s ... Read more
-
Daily CyberSecurity
CVE-2026-4631: Critical 9.8 RCE Flaw in Cockpit Allows Unauthenticated Server Takeover
In the world of Linux server management, ease of use and security are intended to go hand-in-hand. However, a critical vulnerability discovered in Cockpit, the lightweight and popular interactive serv ... Read more
The following table lists the changes that have been made to the
CVE-2026-4631 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by [email protected]
Apr. 10, 2026
Action Type Old Value New Value Added Reference https://access.redhat.com/errata/RHSA-2026:7383 -
CVE Modified by af854a3a-2127-422b-91ae-364da2661108
Apr. 10, 2026
Action Type Old Value New Value Added Reference http://www.openwall.com/lists/oss-security/2026/04/10/5 -
CVE Modified by [email protected]
Apr. 10, 2026
Action Type Old Value New Value Added Reference https://access.redhat.com/errata/RHSA-2026:7382 Added Reference https://access.redhat.com/errata/RHSA-2026:7384 -
CVE Modified by [email protected]
Apr. 10, 2026
Action Type Old Value New Value Added Reference https://access.redhat.com/errata/RHSA-2026:7381 -
New CVE Received by [email protected]
Apr. 07, 2026
Action Type Old Value New Value Added Description 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. Added CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Added CWE CWE-78 Added Reference https://access.redhat.com/security/cve/CVE-2026-4631 Added Reference https://bugzilla.redhat.com/show_bug.cgi?id=2450246