Linux · 
Red Hat · Security advisory · May 27, 2026
Red Hat · Security advisory · May 27, 2026RHBA-2026:21387: Security update for 8 packages
RHBA-2026:21387, released May 27, 2026, fixes 2 CVEs across 8 products. None of them is reported as exploited. Patch Radar priority: Urgent.
Urgent
CVEs closed
2
1 rated Critical
Exploited
0
None reported
Highest CVSS
9.8
Base score, 0 to 10
Highest EPSS
0.0281
86th percentile
Priority of the 2 CVEs
Patch now 0
Urgent 1
High 0
Routine 1
Fixed package versions
| Product | Release | Fixed in |
|---|---|---|
| cockpit | RHEL 9 | 0:356.1-1.el9_8 |
| cockpit-bridge | RHEL 9 | 0:356.1-1.el9_8 |
| cockpit-doc | RHEL 9 | 0:356.1-1.el9_8 |
| cockpit-packagekit | RHEL 9 | 0:356.1-1.el9_8 |
| cockpit-storaged | RHEL 9 | 0:356.1-1.el9_8 |
| cockpit-system | RHEL 9 | 0:356.1-1.el9_8 |
| cockpit-ws | RHEL 9 | 0:356.1-1.el9_8 |
| cockpit-ws-selinux | RHEL 9 | 0:356.1-1.el9_8 |
CVEs this fix closes
| Priority | CVE | Title | CVSS | EPSS | Exploitation |
|---|---|---|---|---|---|
| Urgent | CVE-2026-4800 | cockpit-ws-selinux: Cockpit enables users to administer GNU/Linux servers using a web browser | 9.8 | 0.0281 | None reported |
| Routine | CVE-2026-2950 | cockpit: Impact: Lodash versions 4.17.23 and earlier are vulnerable to prototype pollution in the _.unset and _.omit functions | 6.5 | 0.0034 | None reported |
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