6.5

CVE-2026-56145: elastic elasticsearch Uncontrolled Resource Consumption

CVSS: 6.5v3.1MediumAnalyzed
AliasesCGA-3f4v-f3v7-952vCGA-6fjm-3gmw-39cjCGA-79mf-7pqh-944q
Published 21-07-2026Last modified 22-07-2026
Open JSON

Vulnerability summary

CVE-2026-56145 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 39.7% 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 · +0.14 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-3H34-VQ2V-7253

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 Excessive Allocation (CAPEC-130). A low-privileged authenticated user with permission to execute EQL sequence queries against an index they control can send a specially crafted query that triggers excessive memory consumption, causing the Elasticsearch node to crash.

CVSS metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

0.47%

Chance of exploitation in the next 30 days

Percentile

40%

Versus all other CVEs

30-day change

+0.14 pp

From 0.33% on 21-09-2026

21-09-202621-10-2026
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-r1 | < 9.5.0-r0
Wolfi4 products
  • ruby3.2-elasticsearch< 9.5.0-r0
  • ruby3.3-elasticsearch< 9.5.0-r0
  • ruby3.4-elasticsearch< 9.5.0-r1 | < 9.5.0-r0
  • ruby4.0-elasticsearch< 9.5.0-r0
Elastic1 product
  • elasticsearch≥ 9.4.0, ≤ 9.4.3 | ≥ 8.0.0, ≤ 8.19.17 | ≥ 9.0.0, ≤ 9.3.6 | ≥ 8.0.0, < 8.19.18 | ≥ 9.0.0, < 9.3.7 | ≥ 9.4.0, < 9.4.4

3 vendors · 11 products

References

3 links