Rest request attempted to inject a user – How to solve this Elasticsearch exception

Opster Team

August-23, Version: 6.8-8.9

Briefly, this error occurs when a REST request tries to inject a user into Elasticsearch, which is a security violation. This could be due to a misconfiguration or a malicious attempt to gain unauthorized access. To resolve this issue, you can: 1) Review and correct your REST API calls to ensure they are not attempting to inject users. 2) Check your security settings and permissions to ensure they are correctly configured. 3) Update your Elasticsearch version if it’s outdated, as newer versions have better security features.

This guide will help you check for common problems that cause the log ” rest request attempted to inject a user ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: rest, request, plugin.

Log Context

Log “rest request attempted to inject a user” class name is We extracted the following from Elasticsearch source code for those seeking an in-depth context :

 }  @Override
 ElasticsearchSecurityException tamperedRequest() {
 auditTrail.tamperedRequest(requestId; request);
 return new ElasticsearchSecurityException("rest request attempted to inject a user");
 }  @Override
 ElasticsearchSecurityException exceptionProcessingRequest(Exception e; @Nullable AuthenticationToken token) {
 if (token != null) {


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