Cross-site scripting in Cacti - CVE-2026-39900
Published: June 19, 2026
Vulnerability identifier: #VU134960
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:U/U:Green
CVE-ID: CVE-2026-39900
CWE-ID: CWE-79
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: The Cacti Group, Inc.
Affected software:
Cacti
Cacti
Detailed vulnerability description
The vulnerability allows a remote attacker to execute arbitrary script in the victim's browser.
The vulnerability exists due to cross-site scripting in auth_profile.php when processing the tab parameter in a JavaScript string context. A remote attacker can send a specially crafted request to execute arbitrary script in the victim's browser.
How to mitigate CVE-2026-39900
Install security update from vendor's website.