CVE-2026-17548 Missing authorization for viewing background jobs
Authenticated users can view unauthorized background job status and results by guessing job IDs in Checkmk monitoring software.
- 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-2026-17548?
CVE-2026-17548 is a medium-severity missing authorization vulnerability in Checkmk, published on 25 Aug 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
Missing authorization in Checkmk <2.5.0p12, <2.4.0p36, <2.3.0p50 and all 2.2.0 versions allows an authenticated user who knows the ID of a background job to view that job's status and results.
Weakness: CWE-862
Which versions are affected by CVE-2026-17548?
How do I fix CVE-2026-17548?
No fix has been published for CVE-2026-17548 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-2026-17548 being exploited?
There is no known exploitation of CVE-2026-17548 in the wild and no public exploit code.
Sources
Also known as GHSA-rjq7-c36f-2246, UBUNTU-CVE-2026-17548.