CVE-2026-24096 Insufficient permission validation on multiple REST API Quick Setup endpoints
Low-privileged users can perform unauthorized actions or access sensitive information via Checkmk REST API endpoints due to insufficient permission checks.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-24096?
CVE-2026-24096 is a medium-severity missing authorization vulnerability in Checkmk Checkmk, published on 1 Apr 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
Insufficient permission validation on multiple REST API Quick Setup endpoints in Checkmk 2.5.0 (beta) before version 2.5.0b2 and 2.4.0 before version 2.4.0p25 allows low-privileged users to perform unauthorized actions or obtain sensitive information
Weakness: CWE-280
Which versions are affected by CVE-2026-24096?
It affects 1 product.
Products include Checkmk Checkmk.
How do I fix CVE-2026-24096?
No fix has been published for CVE-2026-24096 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-24096 being exploited?
There is no known exploitation of CVE-2026-24096 in the wild and no public exploit code.
Other vulnerabilities in Checkmk Checkmk
- CVE-2025-39666 omd: Local privilege escalation when executing omd commands as root
- CVE-2024-8606 Fix 2FA bypass via RestAPI
- CVE-2022-46836 PHP code injection in watolib
- CVE-2025-32919 Privilege Escalation in Windows License plugin for Checkmk Windows Agent
- CVE-2024-28827 Privilege escalation in Windows agent
Sources
Also known as GHSA-4fwv-vp29-wx8m, UBUNTU-CVE-2026-24096.