BloodHound Missing Authorization on Custom Node Management API (CVE-2026-59255) | HOL Guard CVE

High · CVSS 7.1CVE-2026-59255

BloodHound Missing Authorization on Custom Node Management API

Answer in brief

CVE-2026-59255 records a High severity (CVSS 7.1) vulnerability in BloodHound Missing Authorization on Custom Node Management API. The current sources do not mark it as known exploited. The current feed maps SpecterOps/BloodHound (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Jul 15, 2026Updated Sep 17, 2026Source checked Sep 17, 2026First seen by HOL Jul 15, 2026Material review Sep 17, 2026

Upstream Advisory

Key facts

Risk: High · CVSS 7.1
Exploitation: Not marked as known exploited
Affected software: 1 mapped package or product
Fix availability: Not reported

Why this deserves its current priority

CVSS is 7.1. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps SpecterOps/BloodHound (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
SpecterOps/BloodHoundgeneric	0	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for SpecterOps/BloodHound.
Review the reported fix. Monitor this advisory for an available fix and review any installs of the affected package.

Evidence timeline and material changes

Published upstream
Jul 15, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Sep 17, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Jul 15, 2026

Sources and claim methodology

Upstream source 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.

Quoted source text, attributed separately from HOL analysis.