CVE-2026-63263 Affecting ruby3.3-elasticsearch package, versions <9.5.0-r0
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-WOLFILATEST-RUBY33ELASTICSEARCH-18553581
- published6 Aug 2026
- disclosed22 Jul 2026
Introduced: 22 Jul 2026
NewCVE-2026-63263 (opens in a new tab)How to fix?
Upgrade Wolfi ruby3.3-elasticsearch to version 9.5.0-r0 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream ruby3.3-elasticsearch package and not the ruby3.3-elasticsearch package as distributed by Wolfi.
See How to fix? for Wolfi relevant fixed versions and status.
Uncontrolled Resource Consumption (CWE-400) in Elasticsearch can lead to denial of service via Exponential Data Expansion (CAPEC-197). An authenticated user may submit a specially crafted query to the ES|QL engine that causes exponential CPU consumption during query evaluation. Because the resource exhaustion persists beyond query completion, repeated requests can fully exhaust the available query worker resources, rendering ES|QL queries unavailable until the node is restarted.