High [CVE-2026-4802] Arbitrary command execution via crafted links in system logs UI
This high-severity Red Hat Linux advisory covers CVE-2026-4802 affecting Red Hat Enterprise Linux 10.0 Extended Update Support, Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support, Red Hat Enterprise Linux 8.6 Telecommunications Update Service.
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Summary
Arbitrary command execution via crafted links in system logs UI. Red Hat rates this important (CVSS 8).
Weakness: CWE-78. Affected package(s): cockpit.
Resolved in Red Hat advisory RHSA-2026:21390 — update the affected packages (`sudo dnf update`).
Affected products named by the advisory: Red Hat Enterprise Linux 10.0 Extended Update Support; Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support; Red Hat Enterprise Linux 8.6 Telecommunications Update Service; Red Hat Enterprise Linux 8.6 Update Services for SAP Solutions; and 6 more.
- cockpit-0:334.2-1.el10_0
- cockpit-0:310.8-1.el8_10
- cockpit-0:356.2-1.el9_8
- cockpit-0:334.3-1.el9_6
- cockpit-0:311.3-1.el9_4
- cockpit-0:264.3-1.el8_6
- cockpit-0:356.2-1.el10_2
- cockpit-0:264.3-1.el9_0
- cockpit-0:286.3-1.el9_2
- cockpit-0:286.2-1.el8_8
Official advisory · high-confidence parse· fetched 2 months ago·verify at source
- RHSA-2026:21390
Official advisory · high-confidence parse· fetched 2 months ago·verify at source
Mitigation checklist
- Update the affected package(s) to the fixed version shipped in RHSA-2026:21390 (`sudo dnf update` / `yum update`).
Official advisory · high-confidence parse· fetched 2 months ago·verify at source
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