6.5

CVE-2026-63263: elastic elasticsearch Uncontrolled Resource Consumption

CVSS: 6.5v3.1MediumAnalyzed
AliasesCGA-3j7w-8683-pvc4CGA-5986-8rmh-h38gCGA-9hjh-qwvq-7j98
Published 21-07-2026Last modified 22-07-2026
Open JSON

Vulnerability summary

CVE-2026-63263 is a medium (CVSS 6.5) Uncontrolled Resource Consumption vulnerability in elastic elasticsearch. EPSS estimates a 0.47% chance of exploitation in the next 30 days, higher than 39.4% of scored vulnerabilities.

Overall risk
26/100
0100
Medium · default modelHow is this calculated?
CVSS score
6.5/10
010
Medium · v3.1 (CVE.org)
EPSS score
0.47%
0%100%
Low · +0.23 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 0 · Related 1
CGA-3WH8-3JVQ-W4X9

Timeline

  1. 21-07-2026
    PublishedVulnerability first disclosed.
  2. 22-07-2026
    Last modifiedVulnerability information updated.

Description

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.

CVSS metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

0.47%

Chance of exploitation in the next 30 days

Percentile

39%

Versus all other CVEs

30-day change

+0.23 pp

From 0.24% on 19-09-2026

19-09-202619-10-2026
EPSS score
0.47%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Chainguard6 products
  • elasticsearch-9.1All versions (No fix recorded)
  • elasticsearch-9.2All versions (No fix recorded)
  • ruby3.2-elasticsearch< 9.5.0-r0
  • ruby3.3-elasticsearch< 9.5.0-r0
  • ruby3.4-elasticsearch< 9.5.0-r0 | < 9.5.0-r1
Wolfi4 products
  • ruby3.2-elasticsearch< 9.5.0-r0
  • ruby3.3-elasticsearch< 9.5.0-r0
  • ruby3.4-elasticsearch< 9.5.0-r0 | < 9.5.0-r1
  • ruby4.0-elasticsearch< 9.5.0-r0
Elastic1 product
  • elasticsearch≥ 9.4.0, ≤ 9.4.3 | ≥ 9.0.0, ≤ 9.3.7 | ≥ 8.0.0, ≤ 8.19.18 | ≥ 8.0.0, < 8.19.19 | ≥ 9.0.0, < 9.3.8 | ≥ 9.4.0, < 9.4.4

3 vendors · 11 products

References

3 links