CVE-2026-115290 PUBLISHED

Uncontrolled Recursion in Elasticsearch Leading to Denial of Service

Assigner: elastic
Reserved: 22.10.2026 Published: 03.11.2026 Updated: 03.11.2026

Uncontrolled Recursion (CWE-674) in Elasticsearch can lead to denial of service via Serialized Data with Nested Payloads (CAPEC-230). An unauthenticated attacker with network access to the remote cluster server interface of a node can send a specially crafted request that causes the node to terminate. No credentials are required. The attacker can repeat the request against each reachable node.

Metrics

CVSS 3.1

CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS Score: 7.5

Attack Vector	Network	Scope	Unchanged
Attack Complexity	Low	Confidentiality Impact	None
Privileges Required	None	Integrity Impact	None
User Interaction	None	Availability Impact	High

CVSS 3.1

Product Status

Vendor	Elastic
Product	Elasticsearch
Versions	Default: unaffected affected from 8.10.0 to 8.19.23 (incl.) affected from 9.0.0 to 9.4.8 (incl.) affected from 9.5.0 to 9.5.5 (incl.)

References

https://discuss.elastic.co/t/elasticsearch-8-19-24-9-4-9-9-5-6-security-update-esa-2026-201/391356

Problem Types

CWE-674 Uncontrolled Recursion CWE

Impacts

CAPEC-230 Serialized Data with Nested Payloads