A flaw was discovered in Elasticsearch, where a large recursion using the innerForbidCircularReferences function of the PatternBank class could cause the Elasticsearch node to crash.
A successful attack requires a malicious user to have readpipeline Elasticsearch cluster privilege assigned to them.
// cvss v3.1 vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Attack complexity
Low
Privileges required
Low
User interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High
Checked 2026-09-25 at 21:48 UTC. The most recent advisory here was published 2025-04-08. Updated continuously from NVD, GHSA, OSV and CNA feeds.