CVE-2018-17244

Severity: medium (CVSS 6.5 v3.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.5% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2018-12-20 · updated 2026-06-17
Weakness: CWE-362

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.

Affected products

Elasticsearch: from 6.4.0 through 6.4.2

References

http://www.securityfocus.com/bid/106318
https://discuss.elastic.co/t/elastic-stack-6-4-3-and-5-6-13-security-update/155594
https://www.elastic.co/community/security
http://www.securityfocus.com/bid/106318
https://discuss.elastic.co/t/elastic-stack-6-4-3-and-5-6-13-security-update/155594
https://www.elastic.co/community/security

Get alerted when CVE-2018-17244 or the next vulnerability affects your stack