CVE-2026-59255 BloodHound Missing Authorization on Custom Node Management API
Authenticated attackers can modify the global graph schema by accessing unprotected custom node API endpoints in BloodHound.
- 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-2026-59255?
CVE-2026-59255 is a high-severity missing authorization vulnerability in SpecterOps BloodHound, published on 15 Jul 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
BloodHound through 9.4.0, fixed in commit 8f79035, contains a missing authorization vulnerability in the custom-nodes API endpoints that allows any authenticated user to modify the global graph schema. Attackers with valid session tokens can create, update, or delete custom node types affecting all users and tenants by invoking unprotected POST, PUT, and DELETE operations on the custom-nodes endpoints.
Weakness: CWE-862
Which versions are affected by CVE-2026-59255?
How do I fix CVE-2026-59255?
No fix has been published for CVE-2026-59255 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-2026-59255 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-59255 exists.
Sources
Also known as GHSA-7qmq-x64g-8v7j.