CVE-2026-102404

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{"bugzilla": {"description": "elasticsearch: Elasticsearch: Denial of Service via uncontrolled memory consumption from crafted queries", "id": "2547107", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2547107"}, "csaw": false, "cvss3": {"cvss3_base_score": "6.5", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-770", "details": ["Uncontrolled Resource Consumption (CWE-400) in Elasticsearch can lead to denial of service via Excessive Allocation (CAPEC-130). A low-privileged authenticated user can submit a specially crafted query that causes uncontrolled memory growth in the query processing engine, resulting in an out-of-memory condition that terminates the Elasticsearch node. The condition can be triggered repeatedly, including by queries embedded in shared resources, causing persistent cluster unavailability.", "A flaw was found in Elasticsearch. An authenticated remote attacker with low privileges can submit a specially crafted query to the query processing engine, triggering excessive memory allocation. This uncontrolled memory growth leads to an out-of-memory crash that terminates the service node, resulting in a Denial of Service (DoS) and cluster unavailability."], "mitigation": {"lang": "en:us", "value": "Restrict network exposure by limiting access to the Elasticsearch service to trusted internal networks and authorized hosts using host-level firewalling or container network policies.\nOn hosts utilizing firewalld, restrict traffic on the service port (TCP port 9200) to trusted IP addresses:\nfirewall-cmd --permanent --zone=trusted --add-source=<TRUSTED_IP_OR_CIDR>\nfirewall-cmd --permanent --remove-port=9200/tcp\nfirewall-cmd --reload\nIn OpenShift or Kubernetes environments, apply NetworkPolicies to restrict ingress traffic to the Elasticsearch pods, permitting communication only from trusted application namespaces. Additionally, restrict query execution privileges using role-based access control so that untrusted accounts cannot execute arbitrary queries.\nCaveats: Network filtering and access restrictions prevent untrusted network actors from submitting queries, but authenticated trusted accounts can still trigger the vulnerability. Reloading firewall rules or applying network policies may cause brief connection drops for active sessions."}, "name": "CVE-2026-102404", "package_state": [{"cpe": "cpe:/a:redhat:openshift_ai", "fix_state": "Fix deferred", "package_name": "rhoai/odh-feature-server-rhel9", "product_name": "Red Hat OpenShift AI (RHOAI)"}, {"cpe": "cpe:/a:redhat:quay:3", "fix_state": "Not affected", "package_name": "quay/quay-rhel8", "product_name": "Red Hat Quay 3"}, {"cpe": "cpe:/a:redhat:quay:3", "fix_state": "Not affected", "package_name": "quay/quay-rhel9", "product_name": "Red Hat Quay 3"}], "public_date": "2026-10-06T19:31:34Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-102404\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-102404\nhttps://discuss.elastic.co/t/elasticsearch-8-19-23-9-4-8-9-5-5-security-update-esa-2026-185/390859"], "statement": "This vulnerability is rated as Moderate because exploitation requires valid credentials to execute search requests and is constrained to causing a denial of service without compromising data integrity or confidentiality. In typical Red Hat deployments, access to search endpoints is confined to internal platform services and authenticated users within private networks rather than exposed publicly. While an authenticated client with query privileges can trigger an out-of-memory crash on affected nodes, the issue cannot be leveraged to gain unauthorized system access or execute arbitrary code.", "threat_severity": "Moderate"}

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