Open Redirect Affecting cacti package, versions <1.2.31-0
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-ALPINE324-CACTI-17373786
- published18 Jun 2026
- disclosed25 Jun 2026
Introduced: 18 Jun 2026
CVE-2026-40080 (opens in a new tab)How to fix?
Upgrade Alpine:3.24 cacti to version 1.2.31-0 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream cacti package and not the cacti package as distributed by Alpine.
See How to fix? for Alpine:3.24 relevant fixed versions and status.
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.