Host Header Injection in Splunk Enterprise

Advisory ID: SVD-2022-1102

CVE ID: CVE-2022-43562

Published: 2022-11-02

Last Update: 2022-11-02

CVSSv3.1 Score: 3.0, Low, Low


Bug ID: SPL-224156


In Splunk Enterprise versions below 8.1.12, 8.2.9, and 9.0.2, Splunk Enterprise fails to properly validate and escape the Host header, which could let a remote authenticated user conduct various attacks against the system, including cross-site scripting and cache poisoning.


For Splunk Enterprise, upgrade versions to 8.1.12, 8.2.9, 9.0.2, or higher.

For Splunk Cloud Platform, Splunk is actively patching and monitoring the Splunk Cloud instances.

Product Status

ProductVersionComponentAffected VersionFix Version
Splunk Enterprise8.1Splunk Web8.1.11 and lower8.1.12
Splunk Enterprise8.2Splunk Web8.2.0 to
Splunk Enterprise9.0Splunk Web9.0.0 to
Splunk Cloud PlatformSplunk Web9.0.2205 and lower9.0.2208

Mitigations and Workarounds





Splunk rated the vulnerability as Low. The vulnerability could potentially let a remote authenticated user inject scripts or manipulate server side behavior through a specially crafted HTTP request. Splunk has not, however, observed a direct exploitation technique. Hence, Splunk scored the vulnerability as 3.0 with a CVSSv3.1 vector of CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:L/I:N/A:N.


Ali Mirheidari at Splunk