vulnerability
Elastic Elasticsearch: CVE-2018-17244: Concurrent Execution using Shared Resource with Improper Synchronization
| Severity | CVSS | Published | Added | Modified |
|---|---|---|---|---|
| 4 | (AV:N/AC:L/Au:S/C:P/I:N/A:N) | Dec 20, 2018 | May 13, 2025 | Mar 25, 2026 |
Severity
4
CVSS
(AV:N/AC:L/Au:S/C:P/I:N/A:N)
Published
Dec 20, 2018
Added
May 13, 2025
Modified
Mar 25, 2026
Description
Elasticsearch Security versions 6.4.0 to 6.4.2 contain an error in the way request headers are applied to requests when using the Active Directory, LDAP, Native, or File realms. A request may receive headers intended for another request if the same username is being authenticated concurrently; when used with run as, this can result in the request running as the incorrect user. This could allow a user to access information that they should not have access to.
Solution
elastic-elasticsearch-upgrade-latest
References
Rapid7 Labs
2026 Global Threat Landscape Report
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