Use of Hard-coded Cryptographic Key in Splunk Enterprise - CVE-2026-76258
Published: August 20, 2026
Vulnerability identifier: #VU144436
CSH Severity: Low
CVSS v4: 7.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-76258
CWE-ID: CWE-321
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote user to disclose mobile user tokens.
The vulnerability exists due to use of a hard-coded cryptographic key in the Splunk Secure Gateway companion app registration handler when registering callback URLs. A remote user can register an arbitrary companion app to forward mobile user requests to an attacker-controlled URL.
Affected software
Splunk Enterprise
How to mitigate CVE-2026-76258
Install security update from vendor's website.
Splunk Enterprise - addressed in versions 9.4.14, 10.0.9, 10.2.6, 10.4.2