Vulnerability · Published Jan 21, 2026 · Assigned by GitHub_M
CVE-2026-23517Fleet has an Access Control vulnerability in debug/pprof endpoints
Medium 6.3
In plain English
A medium-severity missing authorization in fleet from fleetdm. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 22% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official description
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 packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Go | github.com/fleetdm/fleet | 4.78.3 | GHSA-4r5r-ccr6-q6f6 |
| Go | github.com/fleetdm/fleet | 4.77.1 | GHSA-4r5r-ccr6-q6f6 |
| Go | github.com/fleetdm/fleet | 4.76.2 | GHSA-4r5r-ccr6-q6f6 |
| Go | github.com/fleetdm/fleet | 4.75.2 | GHSA-4r5r-ccr6-q6f6 |
| Go | github.com/fleetdm/fleet/v4 | 4.78.3-0.20260112221730-5c030e32a3a9 | GHSA-4r5r-ccr6-q6f6 |
| Go | github.com/fleetdm/fleet/v4 | 4.75.2, 4.76.2, 4.77.1, 4.78.3 | GO-2026-4334 |
Affected products (as reported)
Weakness: CWE-862 · Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U