CVE-2026-56149

{"id": "CVE-2026-56149", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-56149", "role": "CISA Coordinator", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "version": "2.0.3", "timestamp": "2026-07-01T17:18:43.883917Z"}}], "cvssMetricV31": [{"type": "Secondary", "source": "security@elastic.co", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 4.9, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "HIGH", "confidentialityImpact": "NONE"}, "impactScore": 3.6, "exploitabilityScore": 1.2}]}, "affected": [{"source": "security@elastic.co", "affectedData": [{"vendor": "Elastic", "product": "Elasticsearch", "versions": [{"status": "affected", "version": "9.4.0", "versionType": "semver", "lessThanOrEqual": "9.4.2"}, {"status": "affected", "version": "9.0.0", "versionType": "semver", "lessThanOrEqual": "9.3.5"}, {"status": "affected", "version": "8.0.0", "versionType": "semver", "lessThanOrEqual": "8.19.16"}], "defaultStatus": "unaffected"}]}], "published": "2026-07-01T17:16:36.957", "references": [{"url": "https://discuss.elastic.co/t/elasticsearch-8-19-17-9-3-6-9-4-3-security-update-esa-2026-43", "tags": ["Vendor Advisory"], "source": "security@elastic.co"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Secondary", "source": "security@elastic.co", "description": [{"lang": "en", "value": "CWE-770"}]}], "descriptions": [{"lang": "en", "value": "Allocation of Resources Without Limits or Throttling (CWE-770) in Elasticsearch can lead to a denial of service via Excessive Allocation (CAPEC-130). A user with elevated privileges can submit a specially crafted machine learning request that causes excessive memory consumption, which may render the affected node unavailable."}], "lastModified": "2026-07-02T17:35:59.397", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:elastic:elasticsearch:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "1418D3D7-31ED-45BF-BD7E-22E3081F118F", "versionEndExcluding": "8.19.17", "versionStartIncluding": "8.0.0"}, {"criteria": "cpe:2.3:a:elastic:elasticsearch:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "56D2B290-835D-4343-8E77-F478C97ED202", "versionEndExcluding": "9.3.6", "versionStartIncluding": "9.0.0"}, {"criteria": "cpe:2.3:a:elastic:elasticsearch:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "3BEEF187-66DE-4DBF-8C7D-B5A49BED2CA6", "versionEndExcluding": "9.4.3", "versionStartIncluding": "9.4.0"}], "operator": "OR"}]}], "sourceIdentifier": "security@elastic.co"}