Elastic Cloud Enterprise (ECE) 3.8.6 and 4.2.1 Security Update (ESA-2026-215)

Improper Link Resolution Before File Access ('Link Following') in Elastic Cloud Enterprise (ECE) Leading to Authentication Bypass Improper Link Resolution Before File Access ('Link Following') (CWE-59) in Elastic Cloud Enterprise (ECE) can lead to authentication bypass and unauthorized changes to the configuration of other deployments on the same host via Symlink Attack (CAPEC-132). Affected Versions: 1.x, 2.x and 3.x: All versions from 1.0.0 up to and including 3.8.5 4.x: All versions from 4.0.0 up to and including 4.2.0 Affected Configurations: ECE installations that run more than one deplo…

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On 10/29/2026, 07:46 PM, Elastic Security Announcements published "Elastic Cloud Enterprise (ECE) 3.8.6 and 4.2.1 Security Update (ESA-2026-215)" (type: Advisory). Related technologies: Elasticsearch / OpenSearch.