CVE-2026-55544 NextCRM has BOLA/IDOR in MCP Campaign Tools that Allows Cross-User Campaign Disclosure and Tampering
Authenticated users can access and modify other users' campaigns due to missing authorization checks in MCP tools.
- 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-2026-55544?
CVE-2026-55544 is a high-severity missing authorization vulnerability in pdovhomilja nextcrm-app, published on 20 Jul 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
NextCRM is open-source customer relationship management (CRM) software. In version 0.12.1, the MCP campaign tools expose campaign read and write operations over the network using user-generated Bearer API tokens (`nxtc__...`). The application has an authorization model that restricts normal users to campaigns they created, but multiple MCP campaign handlers ignore the authenticated user ID and query or mutate campaigns only by object ID. As a result, a low-privileged authenticated user with a valid MCP API token can enumerate all campaigns, read campaign details, update or delete campaigns owned by other users, modify campaign templates and steps, and potentially trigger or pause campaign delivery. Version 0.12.2 fixes the issue.
Which versions are affected by CVE-2026-55544?
How do I fix CVE-2026-55544?
No fix has been published for CVE-2026-55544 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-2026-55544 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-55544 exists.
Sources
Also known as GHSA-c9vg-c532-ppqx.