CVE-2026-56149 — Allocation of Resources Without Limits or Throttling in Elasticsearch Leading to Denial of Service

CVE-2026-56149

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

Description (CNA)

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 machine learning request that causes excessive memory consumption, which may render the affected node unavailable.

Affected (CNA)

Vendor / product	Versions
Elastic / Elasticsearch	affected 9.4.0 through 9.4.2; affected 9.0.0 through 9.3.5; affected 8.0.0 through 8.19.16

CWE

CWE-770

References

https://discuss.elastic.co/t/elasticsearch-8-19-17-9-3-6-9-4-3-security-update-esa-2026-43

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.