{
  "canonical_id": "kibana--4d0ef3a07b",
  "system_id": "kibana",
  "display_name": "Kibana",
  "category": "platforms",
  "advisory_mode": "core",
  "title": "Metricbeat 8.19.13, 9.2.5 Security Update (ESA-2026-09)",
  "summary": "<p><strong>Memory Allocation with Excessive Size Value in Metricbeat Leading to Denial of Service</strong></p>\n<p>Memory Allocation with Excessive Size Value (CWE-789) in the Prometheus remote_write HTTP handler in Metricbeat can lead Denial of Service via Excessive Allocation (CAPEC-130).</p>\n<p><strong>Affected Versions:</strong></p>\n<ul>\n<li>8.x: All versions from 8.0.0 up to and including 8.19.12</li>\n<li>9.x: All versions from 9.0.0 up to and including 9.2.4</li>\n</ul>\n<p><strong>Affected Configurations:</strong><br>\nThe Prometheus <code>remote_write</code> module is not enabled by default in Metricbeat, so this issue only affects users who have enabled it.</p>\n<p><strong>Solutions and Mitigations:</strong></p>\n<p>The issue is resolved in version 8.19.13, 9.2.5 .</p>\n<p><strong>For Users that Cannot Upgrade:</strong></p>\n<ol>\n<li>Disable the remote_write module if it is not required for operations:\n<ul>\n<li>Remove or comment out the Prometheus <code>remote_write</code> configuration block in <code>metricbeat.yml</code></li>\n<li>Restart Metricbeat to apply changes</li>\n</ul>\n</li>\n<li>Restrict network access using firewall rules or network policies:\n<ul>\n<li>Limit access to the <code>remote_write</code> endpoint to trusted Prometheus server IP addresses only</li>\n<li>Use host: \"localhost\" binding if the Prometheus server runs on the same host</li>\n</ul>\n</li>\n</ol>\n<p><strong>Indicators of Compromise (IOC)</strong></p>\n<p>Log Patterns:</p>\n<ul>\n<li>Metricbeat process termination with \u201cout of memory\" messages in system logs</li>\n<li>Repeated Metricbeat crashes or restarts when the Prometheus <code>remote_write</code> module is enabled</li>\n<li>OOM events in kernel logs <code>dmesg</code> or container orchestration logs targeting the Metricbeat process</li>\n</ul>\n<p>Audit Trail Indicators:</p>\n<ul>\n<li>Sudden memory consumption spikes in Metricbeat process metrics immediately preceding process termination</li>\n<li>Network connections from unexpected or unauthorized source IP addresses to the <code>remote_write</code> endpoint port</li>\n</ul>\n<p><strong>Severity:</strong> CVSSv3.1: Medium ( 5.7 ) - CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H<br>\n<strong>CVE ID</strong>: CVE-2026-26931<br>\n<strong>Problem Type:</strong> CWE-789 - Memory Allocation with Excessive Size Value<br>\n<strong>Impact:</strong> CAPEC-130 - Excessive Allocation</p>\n            <p><small>1 post - 1 participant</small></p>\n            <p><a href=\"https://discuss.elastic.co/t/metricbeat-8-19-13-9-2-5-security-update-esa-2026-09/385532\">Read full topic</a></p>",
  "published_at": "Thu, 19 Mar 2026 16:54:15 +0000",
  "updated_at": "Thu, 19 Mar 2026 16:54:15 +0000",
  "severity": "unknown",
  "cvss_score": null,
  "exploit_status": "unknown",
  "source_confidence": "official",
  "official_source_url": "https://discuss.elastic.co/t/metricbeat-8-19-13-9-2-5-security-update-esa-2026-09/385532",
  "secondary_source_urls": [],
  "aliases": [],
  "cve_ids": [],
  "ghsa_ids": [],
  "osv_ids": [],
  "affected_versions": [],
  "fixed_versions": [],
  "package_name": null,
  "render_markdown": false,
  "case_path": null,
  "secure_code_topics": [
    "authz-server-side-recheck",
    "xss-output-encoding",
    "proxy-trust-boundary",
    "plugin-extension-trust-policy"
  ],
  "status": "triage",
  "triage_reasons": [
    "missing affected/fixed version details"
  ],
  "verification_status": "triage-manual",
  "verification_mode": "synthetic",
  "last_verified_at": null,
  "last_run_id": null,
  "evidence_bundle": null,
  "historical_status": null,
  "latest_status": null,
  "browser_evidence": {
    "required": false,
    "present": false,
    "refs": []
  },
  "repro_profile_id": "xss-generic",
  "artifact_mode": "synthetic",
  "blocked_reason": null,
  "metadata": {
    "source_names": [
      "Elastic Security Announcements RSS"
    ],
    "source_kinds": [
      "rss-feed"
    ],
    "candidate_count": 1
  }
}