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Servers and applications

CVE-2026-72645

Memory Allocation with Excessive Size Value (CWE-789) in Elasticsearch can lead to denial of service via Excessive Allocation (CAPEC-130). An authenticated user holding only read privileges on a single index can submit one small, specially crafted search request that causes an excessively large memory allocation, exhausting the JVM heap and terminating the affected node.

Severity
Medium 6.5
Published
13 Aug 2026
Last changed
1 Sept 2026
Added to UpHeron
21 Oct 2026
Fixed in
8.19.20, 9.4.5, 9.5.1
Sources
NVD

Affected software

SoftwareAffected versions
ElasticsearchServers and applications · cpe:a:elastic:elasticsearch
  • From 8.0.0 before 8.19.20
  • From 9.0.0 before 9.4.5
  • From 9.5.0 before 9.5.1

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2026-72645
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2026-72645