Auth bypass in Elastic Elasticsearch
CVE-2026-56144
Incorrect Authorization (CWE-863) in Elasticsearch can allow an authenticated user with limited index privileges to exploit insufficient authorization controls in the ingest simulation feature. By targeting indices they are not authorized to access directly, the user can cause those indices' configured ingest pipelines to execute and return their output, potentially disclosing data processed or enriched by those pipelines. Additionally, the same feature can be used to retrieve index mapping metadata for indices the user are not authorized to access directly.
Vulnerability class: Broken Access Control
EPSS: 0.002 (14.1th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N.
Affected products
- Elastic Elasticsearch — versions 9.4.0, 9.0.0, 8.12.0
Weakness classification (CWE)
References
- security@elastic.co (Vendor Advisory)
Frequently asked questions
- What is CVE-2026-56144?
- CVE-2026-56144 is a medium-severity vulnerability in Elastic Elasticsearch, classified under Incorrect Authorization. CVSS score: 5.3/10. Published 2026-07-21.
- How severe is CVE-2026-56144?
- Medium severity. CVSS v3 base score is 5.3 out of 10.