Denial of Service Vulnerability in Elasticsearch by Elastic
CVE-2026-94397

6.5MEDIUM

Key Information:

Vendor

Elastic
Status
Elastic
Vendor
CVE Published:
26 September 2026

What is CVE-2026-94397?

A vulnerability identified in Elasticsearch allows for uncontrolled resource consumption, potentially leading to a denial of service. This is due to excessive allocation of resources which can overwhelm the system, causing disruptions. Users should assess their current installations, especially versions 8.19.22, 9.4.7, and 9.5.4, and apply necessary updates to mitigate the risk.

Affected Version(s)

Elasticsearch 8.0.0 <= 8.19.21

Elasticsearch 9.0.0 <= 9.4.6

Elasticsearch 9.5.0 <= 9.5.3

References

https://discuss.elastic.co/t/elasticsearch-8-19-22-9-4-7-...

CVSS V3.1

Score:
6.5
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.