CVE-2026-84828: Red Hat Enterprise Linux 10

Medium severity, CVSS 6.5. EPSS: 0.1% chance of exploitation in the next 30 days.

A flaw was found in PCS (Pacemaker Configuration System). A local attacker with membership in the 'haclient' group can exploit the 'pcs host auth --token' command to read the contents of arbitrary files on the filesystem, provided the files are shorter than 256 bytes. The file contents are read with root privileges by the pcsd daemon and can be exfiltrated by the attacker through subsequent cluster node communication. This allows disclosure of sensitive data such as API keys, tokens, or configuration secrets that would otherwise be inaccessible to the attacker.

Affected products

• Red Hat Red Hat Enterprise Linux 10
• Red Hat Red Hat Enterprise Linux 8
• Red Hat Red Hat Enterprise Linux 9
• Red Hat Red Hat Openshift Container Platform 4
• Red Hat Red Hat Openstack Platform 16.2
• Red Hat Red Hat Openstack Platform 17.1

Published 2026-09-10. Last modified 2026-09-14.