Elastic Elasticsearch vulnerabilities

CVE-2025-37727 [MEDIUM] CWE-532 CVE-2025-37727: Insertion of sensitive information in log file in Elasticsearch can lead to loss of confidentiality 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

CVE-2026-56149 [MEDIUM] CWE-770 CVE-2026-56149: Allocation of Resources Without Limits or Throttling (CWE-770) in Elasticsearch can lead to a denial Allocation of Resources Without Limits or Throttling (CWE-770) in Elasticsearch can lead to a denial of service via Excessive Allocation (CAPEC-130). A user with elevated privileges can submit a specially crafted machine learning request that causes excessive memory consumption, which may render the affected node unavailable.

CVE-2026-56143 [MEDIUM] CWE-770 CVE-2026-56143: Allocation of Resources Without Limits or Throttling (CWE-770) in Elasticsearch can lead to a denial Allocation of Resources Without Limits or Throttling (CWE-770) in Elasticsearch can lead to a denial of service via Excessive Allocation (CAPEC-130). A user with elevated privileges can submit a specially crafted request that causes excessive memory consumption, which may render the affected node unavailable.

CVE-2020-7021 [MEDIUM] CWE-532 CVE-2020-7021: Elasticsearch versions before 7.10.0 and 6.8.14 have an information disclosure issue when audit logg Elasticsearch versions before 7.10.0 and 6.8.14 have an information disclosure issue when audit logging and the emit_request_body option is enabled. The Elasticsearch audit log could contain sensitive information such as password hashes or authentication tokens. This could allow an Elasticsearch administrator to view these details.

CVE-2021-22132 [MEDIUM] CWE-522 CVE-2021-22132: Elasticsearch versions 7.7.0 to 7.10.1 contain an information disclosure flaw in the async search AP Elasticsearch versions 7.7.0 to 7.10.1 contain an information disclosure flaw in the async search API. Users who execute an async search will improperly store the HTTP headers. An Elasticsearch user with the ability to read the .tasks index could obtain sensitive request headers of other users in the cluster. This issue is fixed in Elasticsearch 7.1

CVE-2026-72685 [MEDIUM] CWE-407 CVE-2026-72685: A flaw in Elasticsearch allows a low-privileged authenticated user who can index documents to submit A flaw in Elasticsearch allows a low-privileged authenticated user who can index documents to submit a single small document containing a crafted user-supplied input. Processing one such document occupies a worker thread from a bounded pool for a disproportionate amount of time, degrading the availability of indexing operations on the affected node.

CVE-2026-102408 [MEDIUM] CWE-1333 CVE-2026-102408: Inefficient Regular Expression Complexity (CWE-1333) in Elasticsearch can lead to denial of service Inefficient Regular Expression Complexity (CWE-1333) in Elasticsearch can lead to denial of service via Regular Expression Exponential Blowup (CAPEC-492). The ES|QL CHUNK function's recursive chunking strategy accepts a list of user-supplied regular expressions used as text-splitting separators, without validating their computational complexity or

CVE-2025-68390 [MEDIUM] CWE-770 CVE-2025-68390: Allocation of Resources Without Limits or Throttling (CWE-770) in Elasticsearch can allow an authent Allocation of Resources Without Limits or Throttling (CWE-770) in Elasticsearch can allow an authenticated user with snapshot restore privileges to cause Excessive Allocation (CAPEC-130) of memory and a denial of service (DoS) via crafted HTTP request.

CVE-2026-94408 [MEDIUM] CWE-400 CVE-2026-94408: Uncontrolled Resource Consumption (CWE-400) in Elasticsearch can lead denial of service via Excessiv Uncontrolled Resource Consumption (CWE-400) in Elasticsearch can lead denial of service via Excessive Allocation (CAPEC-130)

CVE-2021-22134 [MEDIUM] CWE-200 CVE-2021-22134: A document disclosure flaw was found in Elasticsearch versions after 7.6.0 and before 7.11.0 when Do A document disclosure flaw was found in Elasticsearch versions after 7.6.0 and before 7.11.0 when Document or Field Level Security is used. Get requests do not properly apply security permissions when executing a query against a recently updated document. This affects documents that have been updated and not yet refreshed in the index. This could re

CVE-2024-37280 [MEDIUM] CWE-122 CVE-2024-37280: A flaw was discovered in Elasticsearch, affecting document ingestion when an index template contains A flaw was discovered in Elasticsearch, affecting document ingestion when an index template contains a dynamic field mapping of “passthrough” type. Under certain circumstances, ingesting documents in this index would cause a StackOverflow exception to be thrown and ultimately lead to a Denial of Service. Note that passthrough fields is an experiment

CVE-2022-23708 [MEDIUM] CWE-264 CVE-2022-23708: A flaw was discovered in Elasticsearch 7.17.0’s upgrade assistant, in which upgrading from version 6 A flaw was discovered in Elasticsearch 7.17.0’s upgrade assistant, in which upgrading from version 6.x to 7.x would disable the in-built protections on the security index, allowing authenticated users with “*” index permissions access to this index.

CVE-2023-31417 [MEDIUM] CWE-532 CVE-2023-31417: Elasticsearch generally filters out sensitive information and credentials before logging to the audi Elasticsearch generally filters out sensitive information and credentials before logging to the audit log. It was found that this filtering was not applied when requests to Elasticsearch use certain deprecated URIs for APIs. The impact of this flaw is that sensitive information such as passwords and tokens might be printed in cleartext in Elasticsea

CVE-2021-22138 [LOW] CWE-295 CVE-2021-22138: In Logstash versions after 6.4.0 and before 6.8.15 and 7.12.0 a TLS certificate validation flaw was In Logstash versions after 6.4.0 and before 6.8.15 and 7.12.0 a TLS certificate validation flaw was found in the monitoring feature. When specifying a trusted server CA certificate Logstash would not properly verify the certificate returned by the monitoring server. This could result in a man in the middle style attack against the Logstash monitoring da

CVE-2020-7020 [LOW] CWE-270 CVE-2020-7020: Elasticsearch versions before 6.8.13 and 7.9.2 contain a document disclosure flaw when Document or F Elasticsearch versions before 6.8.13 and 7.9.2 contain a document disclosure flaw when Document or Field Level Security is used. Search queries do not properly preserve security permissions when executing certain complex queries. This could result in the search disclosing the existence of documents the attacker should not be able to view. This could resu