CVE-2026-4802: Cockpit: cockpit: arbitrary command execution via crafted links in system logs ui

Severity: high (CVSS 8.0 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.0% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-05-11 · updated 2026-10-26
Weakness: CWE-78

Description

A flaw was found in Cockpit. This vulnerability allows a remote attacker to achieve arbitrary command execution on the host by exploiting unsanitized user-controlled parameters within crafted links in the system logs user interface (UI). An attacker can inject shell metacharacters and command substitutions into these parameters, leading to the execution of arbitrary shell commands on the affected system. This could result in a complete system compromise.

Affected products

Red Hat Enterprise Linux 10: all versions — fixed in 0:356.2-1.el10_2
Red Hat Enterprise Linux 10.0 Extended Update Support: all versions — fixed in 0:334.2-1.el10_0
Red Hat Enterprise Linux 8: all versions — fixed in 0:310.8-1.el8_10
Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support: all versions — fixed in 0:264.3-1.el8_6
Red Hat Enterprise Linux 8.6 Telecommunications Update Service: all versions — fixed in 0:264.3-1.el8_6
Red Hat Enterprise Linux 8.6 Update Services for SAP Solutions: all versions — fixed in 0:264.3-1.el8_6
Red Hat Enterprise Linux 8.8 Telecommunications Update Service: all versions — fixed in 0:286.2-1.el8_8
Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions: all versions — fixed in 0:286.2-1.el8_8
Red Hat Enterprise Linux 9: all versions — fixed in 0:356.2-1.el9_8
Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions: all versions — fixed in 0:264.3-1.el9_0
Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions: all versions — fixed in 0:286.3-1.el9_2
Red Hat Enterprise Linux 9.4 Extended Update Support: all versions — fixed in 0:311.3-1.el9_4
Red Hat Enterprise Linux 9.6 Extended Update Support: all versions — fixed in 0:334.3-1.el9_6

How to fix

Upgrade to a fixed version: Red Hat Enterprise Linux 10 0:356.2-1.el10_2; Red Hat Enterprise Linux 10.0 Extended Update Support 0:334.2-1.el10_0; Red Hat Enterprise Linux 8 0:310.8-1.el8_10; Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support 0:264.3-1.el8_6; Red Hat Enterprise Linux 8.6 Telecommunications Update Service 0:264.3-1.el8_6; Red Hat Enterprise Linux 8.6 Update Services for SAP Solutions 0:264.3-1.el8_6; Red Hat Enterprise Linux 8.8 Telecommunications Update Service 0:286.2-1.el8_8; Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions 0:286.2-1.el8_8; Red Hat Enterprise Linux 9 0:356.2-1.el9_8; Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions 0:264.3-1.el9_0; Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions 0:286.3-1.el9_2; Red Hat Enterprise Linux 9.4 Extended Update Support 0:311.3-1.el9_4. Check the vendor advisory for mitigations.

References

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