CVE-2026-63263CWE-400denial-of-service

CVE-2026-63263

Medium · published July 22, 2026

CVSS v3.1
6.5
EPSS
0%
Percentile
39.8
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
6.5 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CVSS v4.0
Not supplied
EPSS
0.00472 · 39.8th percentile
Weakness
CWE-400 · Uncontrolled Resource Consumption
Published
2026-07-22T04:17Z
Affected products (3)
ProductVersionsFixed in
elastic/elasticsearch≥ 8.0.0, < 8.19.198.19.19
elastic/elasticsearch≥ 9.0.0, < 9.3.89.3.8
elastic/elasticsearch≥ 9.4.0, < 9.4.49.4.4
References (1)
https://discuss.elastic.co/t/elasticsearch-8-19-19-9-3-8-9-4-4-security-update-esa-2026-74/388577 · [email protected]
EPSS history
Timeline
  • 21 JUL 23:10Z
    Uncontrolled Resource Consumption in Elasticsearch Leading to Denial of Service
    cvelistv5