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Fencer Vulns
medium 4.9

CVE-2026-56143 json

Allocation of Resources Without Limits or Throttling in Elasticsearch Leading to Denial of Service

published 2026-09-01 2 mo ago modified 2026-09-08 2 mo ago also BIT-elasticsearch-2026-56143 , EUVD-2026-69558

cvss
4.9
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.4%
EPSS 0.4% chance of exploitation in 30 days, percentile 38%
public exploits
0
none known

Summary

Allocation of Resources Without Limits or Throttling (CWE-770) in Elasticsearch can lead to a denial of service via Excessive Allocation (CAPEC-130). A user with elevated privileges can submit a specially crafted request that causes excessive memory consumption, which may render the affected node unavailable.

Patch / fix

  • bitnami elasticsearch 8.19.20, 9.3.0
  • elastic elasticsearch 8.19.20, 9.3.0
  • elasticsearch elasticsearch 8.19.20, 9.3.0
  • org.elasticsearch elasticsearch 8.19.20, 9.3.0

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
2 mo ago

Exploit prediction

0.44% chance of exploitation in the next 30 days, higher than 38% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 4.9 CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
OSV 3.1 4.9 CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H

Affected packages

ecosystem package affected fixed in
bitnami elasticsearch
>=8.0.0, <8.19.20
>=9.0.0, <9.3.0
8.19.20
9.3.0

Affected products

  • Elastic Elasticsearch

Classification

Weakness
  • CWE-770 Allocation of Resources Without Limits or Throttling

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.