Query string does not contain a SAMLRequest parameter – How to solve this Elasticsearch exception

Opster Team

August-23, Version: 7.7-7.15

Briefly, this error occurs when Elasticsearch’s Security Assertion Markup Language (SAML) authentication is unable to find the ‘SAMLRequest’ parameter in the query string. This parameter is essential for SAML authentication. To resolve this issue, ensure that the SAMLRequest parameter is included in your query string. If you’re using a SAML Identity Provider (IdP), verify that it’s correctly configured to send the SAMLRequest parameter. Also, check your application’s SAML settings to ensure they’re correctly set up.

This guide will help you check for common problems that cause the log ” Query string [{}] does not contain a SAMLRequest parameter ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: plugin, request, query.

Log Context

Log “Query string [{}] does not contain a SAMLRequest parameter” class name is SamlAuthnRequestValidator.java. We extracted the following from Elasticsearch source code for those seeking an in-depth context :

 throw new ElasticsearchSecurityException("Invalid Authentication Request query string (zero parameters)");
 logger.trace(new ParameterizedMessage("Parsed the following parameters from the query string: {}"; parameters));
 final String samlRequest = parameters.get("SAMLRequest");
 if (null == samlRequest) {
 throw new ElasticsearchSecurityException("Query string [{}] does not contain a SAMLRequest parameter";
 RestStatus.BAD_REQUEST; queryString);
 return new ParsedQueryString(


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