CVE-2026-72683
Uncontrolled Recursion in Elasticsearch Leading to Denial of Service
Description
A flaw in Elasticsearch allows an authenticated user with the privileges required to invoke the simulate pipeline API endpoint (https://www.elastic.co/docs/api/doc/elasticsearch/operation/operation-ingest-simulate) to submit a request that causes a self-referential data structure to be created. When a specific internal component later processes that structure, the operation recurses without bound and raises a fatal error that is not handled by the surrounding execution path, terminating the affected node process and resulting in a denial of service.
INFO
Published Date :
Aug. 13, 2026, 7:10 p.m.
Last Modified :
Aug. 13, 2026, 7:10 p.m.
Remotely Exploit :
Yes !
Source :
elastic
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | MEDIUM | 271b6943-45a9-4f3a-ab4e-976f3fa05b5a |
Solution
- Update Elasticsearch to a non-vulnerable version.
- Review and restrict access to the simulate pipeline API.
- Monitor node processes for unexpected terminations.
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