Input validation error in Splunk Secure Gateway - CVE-2026-76279
Published: October 12, 2026
Vulnerability identifier: #VU154114
CSH Severity: Low
CVSS v4: 5.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-76279
CWE-ID: CWE-20
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote user to write events to internal indexes outside their role's configured index access.
The vulnerability exists due to improper input validation in the collect SPL command when applying role-based index-access restrictions without normalizing whitespace in an index name. A remote user can supply an index name containing crafted whitespace to the collect command to write events to internal indexes outside their role's configured index access.
Exploitation requires a role with the run_collect capability.
Affected software
Splunk Secure Gateway
Splunk Enterprise
Splunk Enterprise
How to mitigate CVE-2026-76279
Install security update from vendor's website.
Splunk Secure Gateway - addressed in versions 3.8.72, 3.9.25, 3.10.11
Splunk Enterprise - addressed in versions 9.4.15, 10.0.10, 10.2.7, 10.4.3
Splunk Enterprise - addressed in versions 9.4.15, 10.0.10, 10.2.7, 10.4.3