Authorization Bypass Through User-Controlled Key Affecting org.elasticsearch:elasticsearch package, versions [8.13.0,8.19.23)[9.0.0,9.4.8)[9.5.0,9.5.5)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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- published19 Oct 2026
- disclosed6 Oct 2026
- creditUnknown
Introduced: 6 Oct 2026
NewCVE-2026-103009 (opens in a new tab)How to fix?
Upgrade org.elasticsearch:elasticsearch to version 8.19.23, 9.4.8, 9.5.5 or higher.
Overview
org.elasticsearch:elasticsearch is a Distributed, RESTful Search Engine.
Affected versions of this package are vulnerable to Authorization Bypass Through User-Controlled Key in the handling of cross-cluster search requests under the Remote Cluster Security (RCS) 2.0 model. An attacker can access unauthorized document contents, field mappings, metadata, and in limited cases modify retention lease states by sending a crafted request with mismatched shard identifiers, causing the authorization check to validate against an allowed index while accessing a different, unauthorized index. This is only exploitable if the attacker possesses a valid cross-cluster API key.