Improper Neutralization of Null Byte or NUL Character in Splunk Enterprise - CVE-2026-76354
Published: August 20, 2026
Vulnerability identifier: #VU144485
CSH Severity: Medium
CVSS v4: 7.2 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-76354
CWE-ID: CWE-158
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote user to delete or overwrite files.
The vulnerability exists due to improper neutralization of NUL bytes in Search Head Clustering bundle replication when constructing member bundle paths. A remote user can send crafted REST API requests to delete or temporarily overwrite files writable by Splunk Enterprise processes.
The target described is a non-captain search head cluster member.
Affected software
Splunk Enterprise
How to mitigate CVE-2026-76354
Install security update from vendor's website.
Splunk Enterprise - addressed in versions 9.4.14, 10.0.9, 10.2.6, 10.4.2