Vulnerability in Elasticsearch

[ Description ]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.

[ Fixes ]Fixes and patches

No fix or interim patch is linked from our sources yet. Check the vendor references below and limit exposure of affected systems until a fix is available.

[ Advisories ]Government CERT advisories

• CERT-FR4 Nov 2026CERTFR-2026-AVI-1461

  Multiple vulnerabilities in Elastic products Translated from French

  Multiple vulnerabilities have been discovered in Elastic products. Some of them allow an attacker to cause remote arbitrary code execution, remote denial of service and a breach of data confidentiality.

  CVE-2026-115292CVE-2026-91403CVE-2026-115710+13 more CVEs
• BSI CERT-Bund3 Nov 2026WID-SEC-2026-4325

  Elasticsearch: Multiple vulnerabilities Translated from German

  Risk mediumCVE-2026-115710CVE-2026-115298CVE-2026-115715+1 more CVEs

[ References ]References

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