UpHeron
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Servers and applications

CVE-2026-103009

Authorization Bypass Through User-Controlled Key (CWE-639) in Elasticsearch can lead to Information Disclosure via a specially crafted cross-cluster search request that references an unauthorized shard identifier. Elasticsearch contains an authorization bypass weakness in its handling of cross-cluster search requests made through the Remote Cluster Security (RCS) 2.0 model. An authorization…

Severity
High 7.1
Published
6 Oct 2026
Last changed
9 Oct 2026
Added to UpHeron
21 Oct 2026
Fixed in
8.19.23, 9.4.8, 9.5.5
Sources
NVD

Affected software

SoftwareAffected versions
ElasticsearchServers and applications · cpe:a:elastic:elasticsearch
  • From 8.13.0 before 8.19.23
  • From 9.0.0 before 9.4.8
  • From 9.5.0 before 9.5.5

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2026-103009
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2026-103009