All vulnerabilities

Servers and applications

CVE-2026-72638

Uncontrolled Recursion (CWE-674) in Elasticsearch can lead to denial of service via Input Data Manipulation (CAPEC-153). An authenticated user holding only low-privileged index creation permissions can submit a single request containing a specially crafted, malformed custom analysis definition that is resolved recursively without a cycle or depth check, exhausting the thread stack and…

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-2026-72638
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2026-72638