Elasticsearch: Sensitive Data Log Logging via reindex API (CVE-2025-37727)
CVE-2025-37727 Published on October 10, 2025
Elasticsearch Insertion of sensitive information in log file
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
Vulnerability Analysis
Weakness Type
Insertion of Sensitive Information into Log File
Information written to log files can be of a sensitive nature and give valuable guidance to an attacker or expose sensitive user information.
Products Associated with CVE-2025-37727
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Affected Versions
Elasticsearch:- Version 7.0.0, <= 7.17.29 is affected.
- Version 8.0.0, <= 8.18.7 is affected.
- Version 8.19.0, <= 8.19.4 is affected.
- Version 9.0.0, <= 9.0.7 is affected.
- Version 9.1.0, <= 9.1.4 is affected.
Exploit Probability
EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.