CVE-2026-59838: Fortinet Cross-Site Scripting in Domain parameter
This Fortinet advisory covers CVE-2026-59838 in FortiSIEM.
- CVE-2026-59838
Key facts
- Vendor rating
- Medium, CVSS 5.9
- CISA KEV
- Not listed (catalogue checked )
- Affected
- FortiSIEM FortiSIEM: 6.4 through 7.5 (vendor-listed versions)
- Fixed in
- FortiSIEM 7.4: 7.4.1, FortiSIEM 7.3: 7.3.5, FortiSIEM 7.2: 7.2.7 and 6 more below
- Advisory id
- FG-IR-26-149
- Source published
- Source revised
- Listed by VulniPulse
Compiled by VulniPulse from the linked sources. How records are collected and checked.
Affected products & platforms
Description
CVSSv3 Score:
5.9
An Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS) vulnerability [CWE-80] in FortiSIEM may allow a privileged administrator to execute unauthorized commands via crafted requests.
Revised on 2026-07-14 00:00:00
Text from the source record.
- FortiSIEM FortiSIEM: 6.4 through 7.5 (vendor-listed versions)
Official advisory · high-confidence parse· fetched ·verify at source
How to fix CVE-2026-59838
Upgrade to a fixed release named by Fortinet:
- FortiSIEM 7.4: 7.4.1
- FortiSIEM 7.3: 7.3.5
- FortiSIEM 7.2: 7.2.7
- FortiSIEM 7.1: migrate to a fixed release
- FortiSIEM 7.0: migrate to a fixed release
- FortiSIEM 6.7: migrate to a fixed release
- FortiSIEM 6.6: migrate to a fixed release
- FortiSIEM 6.5: migrate to a fixed release
- FortiSIEM 6.4: migrate to a fixed release
Vendor guidance
- Upgrade per the Affected/Solution table: FortiSIEM 7.4: 7.4.1; FortiSIEM 7.3: 7.3.5; FortiSIEM 7.2: 7.2.7; FortiSIEM 7.1: migrate to a fixed release; FortiSIEM 7.0: migrate to a fixed release; ….
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