Vulnerability · Published Oct 16, 2026 · Assigned by Checkmk

CVE-2026-14452Open redirect and XSS via reset_url parameter

High 8.6

In plain English

A high-severity open redirect in Checkmk from Checkmk GmbH. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 22% of all known vulnerabilities).

Severity (CVSS 4.0)8.6High

Exploit odds (30 days)0.3%top 77.7% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

Improper validation of the reset_url parameter of the Setup in-page search in Checkmk <2.5.0p15, <2.4.0p38, <2.3.0p51 and 2.2.0 (EOL) allows an attacker to execute arbitrary script in the session of an authenticated user with Setup access, or to redirect that user to an arbitrary external site, by tricking the user into opening a crafted URL and clicking the Reset button or submitting an empty search.

Affected products (as reported)

Vendor	Product	Versions
Checkmk GmbH	Checkmk	2.5.0 – before 2.5.0p152.4.0 – before 2.4.0p382.3.0 – before 2.3.0p512.2.0

Weakness: CWE-601 · Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:L/SA:N

References

https://checkmk.com/werk/22314 vendor-advisory