CVE-2026-23517

Fleet is open source device management software. A broken access control issue in versions prior to 4.78.3, 4.77.1, 4.76.2, 4.75.2, and 4.53.3 allowed authenticated users to access debug and profiling endpoints regardless of role. As a result, low-privilege users could view internal server diagnostics and trigger resource-intensive profiling operations. Fleet’s debug/pprof endpoints are accessible to any authenticated user regardless of role, including the lowest-privilege “Observer” role. This allows low-privilege users to access sensitive server internals, including runtime profiling data and in-memory application state, and to trigger CPU-intensive profiling operations that could lead to denial of service. Versions 4.78.3, 4.77.1, 4.76.2, 4.75.2, and 4.53.3 fix the issue. If an immediate upgrade is not possible, users should put the debug/pprof endpoints behind an IP allowlist as a workaround.

Affected products

Fleet

Fleetdm Fleet

< 4.53.3, 4.75.2, 4.76.2, 4.78.3, 4.77.0

Fix

Available

CVSS 4.0

8.7 HIGH

CVSS 3.1

8.1 HIGH

EPSS

0.2% (16th percentile)

Weakness

CWE-862

NVD status

Analyzed

Published

2026-01-21

No exploit for CVE-2026-23517 has been indexed yet. Our index is built from live traffic and upstream syncs, so this page can only say what it knows — not that no exploit exists.