What’s Vulnerable › Vulnerabilities
CVE-2026-49090: Uncontrolled Resource Consumption in Elasticsearch Leading to Denial of Service
- Severity: medium (CVSS 6.5 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.4% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2026-07-01 · updated 2026-10-25
- Weakness: CWE-400
Description
Uncontrolled Resource Consumption (CWE-400) in Elasticsearch can lead to a denial of service via Excessive Allocation (CAPEC-130). An authenticated user can submit a specially crafted bulk request that causes sustained high CPU consumption, which can render the affected node unable to process requests.
Affected products
- Elasticsearch: from 7.0.0 before 7.17.24; from 8.0.0 before 8.15.0 — fixed in 7.17.24, 8.15.0
How to fix
Upgrade to a fixed version: Elasticsearch 7.17.24, 8.15.0. Check the vendor advisory for mitigations.
References
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