CVE-2026-72678

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{"bugzilla": {"description": "elasticsearch: Elasticsearch: Denial of Service via excessive memory allocation", "id": "2515557", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2515557"}, "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": ["A flaw was found in Elasticsearch. An authenticated user with read privileges can submit a crafted request that causes the node to attempt an excessively large memory allocation due to unvalidated user input. This memory exhaustion leads to a fatal error, terminating the Elasticsearch node process and causing a Denial of Service (DoS) for the affected node. A single request is sufficient to trigger this issue."], "mitigation": {"lang": "en:us", "value": "Restrict API access permissions using Elasticsearch role-based access control (RBAC) so that only trusted users can access read endpoints. Additionally, configure request circuit breakers (`indices.breaker.request.limit`) to enforce strict memory allocation caps per request execution."}, "name": "CVE-2026-72678", "package_state": [{"cpe": "cpe:/a:redhat:openshift_ai", "fix_state": "Under investigation", "package_name": "rhoai/odh-feature-server-rhel9", "product_name": "Red Hat OpenShift AI (RHOAI)"}, {"cpe": "cpe:/a:redhat:quay:3", "fix_state": "Under investigation", "package_name": "quay/quay-rhel8", "product_name": "Red Hat Quay 3"}, {"cpe": "cpe:/a:redhat:quay:3", "fix_state": "Under investigation", "package_name": "quay/quay-rhel9", "product_name": "Red Hat Quay 3"}], "public_date": "2026-08-13T19:11:02Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-72678\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-72678\nhttps://discuss.elastic.co/t/elasticsearch-8-19-20-9-4-5-9-5-1-security-update-esa-2026-80/389507"], "statement": "An unvalidated allocation flaw exists in Elasticsearch's API request processing mechanisms. When handling user-supplied size parameters during data structure initialization, Elasticsearch fails to bound memory allocation requests. An authenticated remote user with read-only privileges can submit a single crafted API request, forcing an excessively large heap allocation that triggers an Out-Of-Memory (OOM) fatal error and crashes the node process. This results in service disruption and degraded cluster health, posing a high impact to availability.", "threat_severity": "Moderate"}

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