CVE-2026-14452 Open redirect and XSS via reset_url parameter
Attackers can execute arbitrary scripts or redirect users via the reset_url parameter in Checkmk's setup search, requiring user interaction.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-14452?
CVE-2026-14452 is a high-severity cross-site scripting vulnerability in Checkmk, published on 16 Oct 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
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.
Weakness: CWE-601
Which versions are affected by CVE-2026-14452?
How do I fix CVE-2026-14452?
No fix has been published for CVE-2026-14452 yet. Limit exposure of the affected software until one is available.
Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.
Is CVE-2026-14452 being exploited?
There is no known exploitation of CVE-2026-14452 in the wild and no public exploit code.
Sources
Also known as GHSA-v923-r34g-79c7.