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CVE-2026-4631

Cockpit: cockpit: unauthenticated remote code execution due to ssh command-line argument injection

publishedCWE-78

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.

Technical severity9.8 criticalCVSS 3.1 · CNA: redhat
Published2026-04-07Source updated 2026-11-04
Collected2026-11-053 attributed sources

Fixes and workarounds

Fix

RHSA-2026:7381: Red Hat Enterprise Linux AppStream EUS (v. 10.0), Red Hat Enterprise Linux BaseOS EUS (v. 10.0) RHSA-2026:7383: Red Hat Enterprise Linux AppStream (v. 10), Red Hat Enterprise Linux BaseOS (v. 10) RHSA-2026:7382: Red Hat Enterprise Linux AppStream EUS (v.9.6), Red Hat Enterprise Linux BaseOS EUS (v.9.6) RHSA-2026:7384: Red Hat Enterprise Linux AppStream (v. 9), Red Hat Enterprise Linux BaseOS (v. 9)

Source: ADP: redhat-SADP

Affected products and versions

ProductVersionsAuthority
Red Hat Enterprise Linux 10
Red Hat
cockpit
https://access.redhat.com/downloads/content/package-browser/ 		≥ 0:344-3.el10_1; < * (unaffected, rpm)
Other versions: affected 		CNA: redhat
Red Hat Enterprise Linux 10
Red Hat
cockpit
https://access.redhat.com/downloads/content/package-browser/ 		≥ 0:356.1-1.el10_2; < * (unaffected, rpm)
Other versions: affected 		CNA: redhat
Red Hat Enterprise Linux 10.0 Extended Update Support
Red Hat
cockpit
https://access.redhat.com/downloads/content/package-browser/ 		≥ 0:334.1-3.el10_0; < * (unaffected, rpm)
Other versions: affected 		CNA: redhat
Red Hat Enterprise Linux 9
Red Hat
cockpit
https://access.redhat.com/downloads/content/package-browser/ 		≥ 0:356.1-1.el9_8; < * (unaffected, rpm)
Other versions: affected 		CNA: redhat
Red Hat Enterprise Linux 9
Red Hat
cockpit
https://access.redhat.com/downloads/content/package-browser/ 		≥ 0:344-2.el9_7; < * (unaffected, rpm)
Other versions: affected 		CNA: redhat
Red Hat Enterprise Linux 9.6 Extended Update Support
Red Hat
cockpit
https://access.redhat.com/downloads/content/package-browser/ 		≥ 0:334.2-2.el9_6; < * (unaffected, rpm)
Other versions: affected 		CNA: redhat
Red Hat Enterprise Linux 7
Red Hat
cockpit
https://access.redhat.com/downloads/content/package-browser/ 		Range not reported
Other versions: unaffected 		CNA: redhat
Red Hat Enterprise Linux 8
Red Hat
cockpit
https://access.redhat.com/downloads/content/package-browser/ 		Range not reported
Other versions: unaffected 		CNA: redhat
Red Hat Enterprise Linux 10
Red Hat
cockpit
https://access.redhat.com/downloads/content/package-browser/ 		≥ 0:344-3.el10_1; < * (unaffected, rpm)
Other versions: affected 		ADP: redhat-SADP
Red Hat Enterprise Linux 10.0 Extended Update Support
Red Hat
cockpit
https://access.redhat.com/downloads/content/package-browser/ 		≥ 0:334.1-3.el10_0; < * (unaffected, rpm)
Other versions: affected 		ADP: redhat-SADP
Red Hat Enterprise Linux 9
Red Hat
cockpit
https://access.redhat.com/downloads/content/package-browser/ 		≥ 0:344-2.el9_7; < * (unaffected, rpm)
Other versions: affected 		ADP: redhat-SADP
Red Hat Enterprise Linux 9.6 Extended Update Support
Red Hat
cockpit
https://access.redhat.com/downloads/content/package-browser/ 		≥ 0:334.2-2.el9_6; < * (unaffected, rpm)
Other versions: affected 		ADP: redhat-SADP
Red Hat Enterprise Linux 7
Red Hat
cockpit
https://access.redhat.com/downloads/content/package-browser/ 		Range not reported
Other versions: unaffected 		ADP: redhat-SADP
Red Hat Enterprise Linux 8
Red Hat
cockpit
https://access.redhat.com/downloads/content/package-browser/ 		Range not reported
Other versions: unaffected 		ADP: redhat-SADP

Version ranges are source assertions. Check the vendor advisory and your installed configuration before determining exposure.

CVSS assessments

Version / scoreVectorAuthority
3.1 / 9.8
critical		 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HCNA: redhat
3.1 / 9.8
critical		 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HADP: redhat-SADP
3.1 / 9.8
critical		 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HNVD: [email protected]
3.1 / 9.8
critical		 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HNVD: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c

Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

References

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