All vulnerabilities

Servers and applications

CVE-2026-72639

Elasticsearch does not enforce an upper bound on a user-supplied count accepted by a search highlighting option, and the allocation derived from that count is not accounted against any circuit breaker. An authenticated user holding only read privileges on a single searchable index can submit one small search request that causes the node to reserve an excessively large internal data structure.…

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 8.19.0 before 8.19.20
  • From 9.3.0 before 9.4.5
  • From 9.5.0 before 9.5.1

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2026-72639
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2026-72639