CVE-2026-59255

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.

CVSS v4.0

7.1 HIGHCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

CVSS v3.1

7.1 HIGHCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:L

EPSS

0.44% chance of exploitation in the next 30 days, 37th percentile

Published

2026-07-15

Updated

2026-07-28

Proof-of-concept exploits (1)

• SpecterOps/BloodHound/issues/2910

References

• CVE Record
• NVD entry

Related

• CVE-2026-59243
• CVE-2026-59258
• CVE-2026-59230
• CVE-2026-59310
• CVE-2026-59227
• CVE-2026-5952