CVE-2026-39897: Cacti has a Reflected XSS Vulnerability via html_auth_footer

Severity: medium (CVSS 6.1 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-06-24 · updated 2026-06-25
Weakness: CWE-79

Description

Cacti is an open source performance and fault management framework. Versions 1.2.30 and below contain a Reflected XSS vulnerability in the html_auth_footer. This issue has been fixed in version 1.2.31.

Affected products

cacti: before 1.2.31 — fixed in 1.2.31

How to fix

Upgrade to a fixed version: cacti 1.2.31. Check the vendor advisory for mitigations.

References

https://github.com/Cacti/cacti/commit/7c544ea0b45de627f206eefe93005433c2c3864d
https://github.com/Cacti/cacti/security/advisories/GHSA-2j98-xfjq-gw39

Get alerted when CVE-2026-39897 or the next vulnerability affects your stack