Vulnerability · Published Nov 3, 2026 · Assigned by elastic
CVE-2026-115290Uncontrolled Recursion in Elasticsearch Leading to Denial of Service
High 7.5
In plain English
A high-severity security flaw in Elasticsearch from Elastic. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 36% of all known vulnerabilities). Ready-made attack tooling exists: public proof-of-concept code.
Official description
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.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Elastic | Elasticsearch | 8.10.0 – through 8.19.239.0.0 – through 9.4.89.5.0 – through 9.5.5 |
Weakness: CWE-674 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H