All vulnerabilities

Servers and applications

CVE-2026-72656

Memory Allocation with Excessive Size Value (CWE-789) in the ES|QL query processing of Elasticsearch can lead to denial of service via Excessive Allocation (CAPEC-130). An authenticated user able to submit ES|QL queries could send a specially crafted query whose evaluation allocates an unbounded amount of heap memory, exhausting the available heap on the receiving node and causing the node to…

Severity
Medium 6.5
Published
13 Aug 2026
Last changed
4 Sept 2026
Added to UpHeron
21 Oct 2026
Fixed in
8.18.0
Sources
NVD

Affected software

SoftwareAffected versions
ElasticsearchServers and applications · cpe:a:elastic:elasticsearch
  • From 8.11.0 before 8.18.0

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2026-72656
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2026-72656