What is CVE-2026-115290?

CVE-2026-115290 is a high-severity vulnerability in Elastic Elasticsearch, classified under Uncontrolled Recursion. CVSS score: 7.5/10. Published 2026-11-03.

How severe is CVE-2026-115290?

High severity. CVSS v3 base score is 7.5 out of 10.

Vulnerability in Elastic Elasticsearch

CVE-2026-115290

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.

Published 2026-11-03 · last modified 2026-11-03.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Affected products

Elastic Elasticsearch

Weakness classification (CWE)

CWE-674 — Uncontrolled Recursion

References

discuss.elastic.co/t/elasticsearch-8-19-24-9-4-9-9-5-6-security-update-esa-2026…

Frequently asked questions

What is CVE-2026-115290?: CVE-2026-115290 is a high-severity vulnerability in Elastic Elasticsearch, classified under Uncontrolled Recursion. CVSS score: 7.5/10. Published 2026-11-03.
How severe is CVE-2026-115290?: High severity. CVSS v3 base score is 7.5 out of 10.