Elasticsearch: Insertion of Sensitive Information into Log File via reindex API
Insertion of sensitive information in log file in Elasticsearch can lead to loss of confidentiality under specific preconditions when auditing requests to the reindex API https://www.elastic.co/docs/api/doc/elasticsearch/operation/operation-reindex
Affected software
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| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| Java / Kotlin (Maven) | org.elasticsearch.plugin:reindex-client | >= 7.0.0, < 8.18.8, >= 8.19.0, < 8.19.5, >= 9.0.0-beta1, < 9.0.8, >= 9.1.0, < 9.1.5 | 8.18.8, 8.19.5, 9.0.8, 9.1.5 |
References
- https://nvd.nist.gov/vuln/detail/CVE-2025-37727
- https://github.com/elastic/elasticsearch/commit/0b876b816544ff5ed07fc9d67cc584b58241e116
- https://github.com/elastic/elasticsearch/commit/e982eef416a5e1c2a4e94236d7d3b33b5c8d07db
- https://discuss.elastic.co/t/elasticsearch-8-18-8-8-19-5-9-0-8-9-1-5-security-update-esa-2025-18/382453
- https://github.com/elastic/elasticsearch
- https://www.elastic.co/guide/en/elasticsearch/reference/8.18/release-notes-8.18.8.html
- CVSS vector
CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N- Weakness (CWE)
CWE-532- Platform
- Java / Kotlin (Maven)
- Package
org.elasticsearch.plugin:reindex-client- Disclosed
- 10.10.2025
- Updated
- 11.10.2026 13:20
Sources and licenses
OSV / GitHub Advisory Database - GHSA-56r7-h6mw-rcfv - CC BY 4.0
Vulnerability history: org.elasticsearch.plugin:reindex-client
All published vulnerabilities of this package (Java / Kotlin (Maven)), newest first. Shows whether this is a one-off slip or a package that needs watching.
This is the only known vulnerability of this package.
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