Cross-site scripting in FortiSIEM - CVE-2026-59838
Published: July 14, 2026
Vulnerability identifier: #VU137526
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:U/U:Clear
CVE-ID: CVE-2026-59838
CWE-ID: CWE-79
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Fortinet, Inc
Affected software:
FortiSIEM
FortiSIEM
Detailed vulnerability description
The vulnerability allows a remote privileged user to read and manipulate data.
The vulnerability exists due to improper neutralization of input during web page generation ('cross-site scripting') in Domain parameter. A privileged administrator can execute unauthorized commands via crafted requests.
How to mitigate CVE-2026-59838
Install update from vendor's website.