Vulnerability in Elasticsearch

[ Description ]Official description

Uncontrolled Resource Consumption (CWE-400) in Elasticsearch can lead to denial of service via Excessive Allocation (CAPEC-130). A low-privileged authenticated user can submit a specially crafted query that causes uncontrolled memory growth in the query processing engine, resulting in an out-of-memory condition that terminates the Elasticsearch node. The condition can be triggered repeatedly, including by queries embedded in shared resources, causing persistent cluster unavailability.

[ 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-FR7 Oct 2026CERTFR-2026-AVI-1276

  Multiple vulnerabilities in Elastic products Translated from French

  Multiple vulnerabilities have been discovered in Elastic products. Some of them allow an attacker to cause privilege escalation, a breach of data confidentiality and a security policy bypass.

  CVE-2026-102406CVE-2026-103006CVE-2026-102404+11 more CVEs
• BSI CERT-Bund6 Oct 2026WID-SEC-2026-3784

  Elasticsearch: Multiple vulnerabilities Translated from German

  CVE-2026-102404CVE-2026-103005CVE-2026-103006+7 more CVEs

[ References ]References

• discuss.elastic.co/t/elasticsearch-8-19-23-9-4-8-9-5-5-security-update-esa-2026-185/390859Vendor Advisory