Threats Tagged 'cve-2026-84828'

A vulnerability in PCS (Pacemaker Configuration System) allows a local attacker with membership in the 'haclient' group to read arbitrary files up to 256 bytes in size using the 'pcs host auth --token' command. The pcsd daemon reads these files with root privileges, enabling exfiltration of sensitive data such as API keys or tokens through cluster node communication. Exploitation requires local access and privileged group membership, limiting the attack scope. The flaw affects PCS versions from 0.10.8 onwards, including those shipped with Red Hat Enterprise Linux 8.4+, 9.0+, and 10.0+ High Availability add-ons. Mitigation involves restricting 'haclient' group membership to trusted users. No official patch status is provided in the advisory.

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.