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Fencer Vulns
medium 6.5

CVE-2026-56145 json

Uncontrolled Resource Consumption in Elasticsearch Leading to Denial of Service

published 2026-07-21 3 mo ago modified 2026-10-24 15 d ago also BIT-elasticsearch-2026-56145 , EUVD-2026-46395

cvss
6.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.5%
EPSS 0.5% chance of exploitation in 30 days, percentile 41%
public exploits
0
none known

Summary

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.

Patch / fix

  • bitnami elasticsearch 8.19.18, 9.3.7, 9.4.4
  • elastic elasticsearch 8.19.18, 9.3.7, 9.4.4
  • elasticsearch elasticsearch 8.19.18, 9.3.7, 9.4.4
  • org.elasticsearch elasticsearch 8.19.18, 9.3.7, 9.4.4

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
3 mo ago

Exploit prediction

0.47% chance of exploitation in the next 30 days, higher than 41% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 6.5 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
OSV 3.1 6.5 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Affected packages

ecosystem package affected fixed in
bitnami elasticsearch
>=8.0.0, <8.19.18
>=9.0.0, <9.3.7
>=9.4.0, <9.4.4
8.19.18
9.3.7
9.4.4

Affected products

  • Elastic Elasticsearch

Classification

Weakness
  • CWE-400 Uncontrolled Resource Consumption

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.