Vulnerability in Elasticsearch

[ Description ]Official description

Allocation of Resources Without Limits or Throttling (CWE-770) in Elasticsearch can lead to denial of service via a specially crafted input value that is processed by an affected phonetic encoder of the analysis-phonetic plugin. An authenticated user with permission to write documents to or run searches against an index that uses an affected encoder can cause an Elasticsearch node to exhaust its heap memory. The node can become unresponsive or terminate.

[ 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-2026-235/391372