6.5

CVE-2026-72645: elastic elasticsearch

CVSS: 6.5v3.1MediumAnalyzed
AliasesCGA-2gfc-3gmq-9427CGA-4rw7-8m98-jv3cCGA-6j37-2v33-3v3v
Published 13-08-2026Last modified 13-08-2026
Open JSON

Vulnerability summary

CVE-2026-72645 is a medium (CVSS 6.5) vulnerability in elastic elasticsearch. EPSS estimates a 0.42% chance of exploitation in the next 30 days, higher than 35.2% 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
0.42%
0%100%
Low · +0.12 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-723C-WXFF-QQ2C

Timeline

  1. 13-08-2026
    PublishedVulnerability first disclosed.
  2. 13-08-2026
    Last modifiedVulnerability information updated.

Description

Memory Allocation with Excessive Size Value (CWE-789) in Elasticsearch can lead to denial of service via Excessive Allocation (CAPEC-130). An authenticated user holding only read privileges on a single index can submit one small, specially crafted search request that causes an excessively large memory allocation, exhausting the JVM heap and terminating the affected node.

CVSS metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

0.42%

Chance of exploitation in the next 30 days

Percentile

35%

Versus all other CVEs

30-day change

+0.12 pp

From 0.30% on 21-09-2026

21-09-202621-10-2026
EPSS score
0.42%

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-9.2All versions (No fix recorded)
  • elasticsearch-9.3All versions (No fix recorded)
  • ruby3.2-elasticsearchAll versions (No fix recorded)
  • ruby3.3-elasticsearchAll versions (No fix recorded)
  • ruby3.4-elasticsearchAll versions (No fix recorded)
Wolfi4 products
  • ruby3.2-elasticsearchAll versions (No fix recorded)
  • ruby3.3-elasticsearchAll versions (No fix recorded)
  • ruby3.4-elasticsearchAll versions (No fix recorded)
  • ruby4.0-elasticsearchAll versions (No fix recorded)
Elastic1 product
  • elasticsearch≥ 8.0.0, ≤ 8.19.19 | ≥ 9.0.0, ≤ 9.4.4 | 9.5.0 | ≥ 8.0.0, < 8.19.20 | ≥ 9.0.0, < 9.4.5 | ≥ 9.5.0, < 9.5.1

3 vendors · 11 products

References

3 links