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Back to active CVEs
Medium · CVSS 6.5CVE-2026-84828

Pcs: pcs: non-root haclient users can read arbitrary files via pcs host auth --tokenCVE-2026-84828

Answer in brief

CVE-2026-84828 records a Medium severity (CVSS 6.5) vulnerability in Pcs: pcs: non-root haclient users can read arbitrary files via pcs host auth --token. The current sources do not mark it as known exploited. The current feed maps Red Hat/openshift/ose-rhel-coreos-9 (generic), Red Hat/pcs (generic), Red Hat/rhosp-rhel8/openstack-base (generic), Red Hat/rhosp-rhel9/openstack-frr (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Sep 10, 2026Updated Sep 14, 2026Source checked Oct 25, 2026First seen by HOL Sep 10, 2026Material review Sep 14, 2026
Upstream Advisory

Key facts

Risk
Medium · CVSS 6.5
Exploitation
Not marked as known exploited
Affected software
4 mapped packages or products
Fix availability
Not reported

Why this deserves its current priority

CVSS is 6.5. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Red Hat/openshift/ose-rhel-coreos-9 (generic), Red Hat/pcs (generic), Red Hat/rhosp-rhel8/openstack-base (generic), Red Hat/rhosp-rhel9/openstack-frr (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
PackageAffected rangeFixed version
Red Hat/openshift/ose-rhel-coreos-9generic*Not reported
Red Hat/pcsgeneric*Not reported
Red Hat/rhosp-rhel8/openstack-basegeneric*Not reported
Red Hat/rhosp-rhel9/openstack-frrgeneric*Not reported

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for Red Hat/openshift/ose-rhel-coreos-9, Red Hat/pcs, Red Hat/rhosp-rhel8/openstack-base.
  2. 2Review the reported fix. Source-reported workaround: Restrict membership in the 'haclient' group to only trusted users who require cluster management access. Audit current 'haclient' group membership and remove any unnecessary accounts. This reduces exposure but does not fully eliminate the risk for legitimate haclient members.

Evidence timeline and material changes

  1. Published upstream

    Sep 10, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  2. Source modified

    Sep 14, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  3. First seen by HOL

    Sep 10, 2026

Sources and claim methodology

  • Source referenceaccess.redhat.com
  • Source referencebugzilla.redhat.com
  • GitHub security advisorygithub.com
Upstream source description

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.

Quoted source text, attributed separately from HOL analysis.

Record context

Vulnerability class
Secret Exfiltration
EPSS
Not reported
CWE IDs
CWE-732
Source
CVE List V5
Source checked
Oct 25, 2026
References
3 linked sources
Open source record