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Servers and applications

CVE-2026-72647

Uncontrolled Recursion (CWE-674) in Elasticsearch can lead to denial of service via Serialized Data with Nested Payloads (CAPEC-230). An authenticated user holding only read privileges on a single index can submit one specially crafted search request whose deeply nested structure is processed without a depth limit, exhausting the thread stack 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
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

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2026-72647
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2026-72647