PT-2026-52624 · Cacti · Cacti

Published 2026-06-25 · Updated 2026-06-25 · CVE-2026-40080

Mitre

CVSS v3.1

6.1

Medium

Base vector

AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Cacti is an open source performance and fault management framework. Versions 1.2.30 and prior are vulnerable to Open Redirect through a substring check rather than a host check at str contains($referer, CACTI PATH URL). When the user's login opts == '1' (redirect to referer after login), the function used $ SERVER['HTTP REFERER'] directly. An attacker could craft a referer such as https://evil.com/cacti/. Where CACTI PATH URL is /cacti/, the substring matches and the user is redirected to evil.com after login. The pre-existing validate redirect url() helper at lib/html utility.php performed proper validation but was not invoked from auth login redirect(). This issue has been fixed in version 1.2.31.

Fix

Open Redirect

Weakness Enumeration

CWE-601

Related Identifiers

CVE-2026-40080

Affected Products

Cacti

References · 3

• https://nvd.nist.gov/vuln/detail/CVE-2026-40080 · Security Note
• https://github.com/Cacti/cacti/releases/tag/release%2F1.2.31 · Note
• https://github.com/Cacti/cacti/security/advisories/GHSA-6gr7-53g8-vchq · Note