Read the docs
TI-2026-18941 Aliases CVE-2026-23517GHSA-4r5r-ccr6-q6f6

Fleet has an Access Control vulnerability in debug/pprof endpoints

Priority LOW 30CWE-862Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
Security bypass
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA and GitHub. Impact type from CWE-862.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00292 21st percentileScored 2026-11-07
Fix Fixed fleet (fleetdm): 4.78.3, 4.77.1, 4.76.2 +2github.com/fleetdm/fleet (Go): 4.78.3, 4.77.1, 4.76.2 +1+1 more product

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
fleetdmfleet4.78.0 to before 4.78.3; 4.77.0 to before 4.77.1; 4.76.0 to before 4.76.2; 4.75.0 to before 4.75.2; before 4.53.34.78.3, 4.77.1, 4.76.2, 4.75.2, 4.53.3Patch availableCNA
—github.com/fleetdm/fleet (Go)4.78.0 to before 4.78.34.78.3Patch availableGHSA-4r5r-ccr6-q6f6
—github.com/fleetdm/fleet (Go)4.77.0 to before 4.77.14.77.1Patch availableGHSA-4r5r-ccr6-q6f6
—github.com/fleetdm/fleet (Go)4.76.0 to before 4.76.24.76.2Patch availableGHSA-4r5r-ccr6-q6f6
—github.com/fleetdm/fleet (Go)4.75.0 to before 4.75.24.75.2Patch availableGHSA-4r5r-ccr6-q6f6
—github.com/fleetdm/fleet/v4 (Go)before 4.78.3-0.20260112221730-5c030e32a3a94.78.3-0.20260112221730-5c030e32a3a9Patch availableGHSA-4r5r-ccr6-q6f6
  • fleet Vendorfleetdm Affected 4.78.0 to before 4.78.3; 4.77.0 to before 4.77.1; 4.76.0 to before 4.76.2; 4.75.0 to before 4.75.2; before 4.53.3 Fixed in 4.78.3, 4.77.1, 4.76.2, 4.75.2, 4.53.3 Patch available CNA
  • github.com/fleetdm/fleet (Go) Vendor— Affected 4.78.0 to before 4.78.3 Fixed in 4.78.3 Patch available GHSA-4r5r-ccr6-q6f6
  • github.com/fleetdm/fleet (Go) Vendor— Affected 4.77.0 to before 4.77.1 Fixed in 4.77.1 Patch available GHSA-4r5r-ccr6-q6f6
  • github.com/fleetdm/fleet (Go) Vendor— Affected 4.76.0 to before 4.76.2 Fixed in 4.76.2 Patch available GHSA-4r5r-ccr6-q6f6
  • github.com/fleetdm/fleet (Go) Vendor— Affected 4.75.0 to before 4.75.2 Fixed in 4.75.2 Patch available GHSA-4r5r-ccr6-q6f6
  • github.com/fleetdm/fleet/v4 (Go) Vendor— Affected before 4.78.3-0.20260112221730-5c030e32a3a9 Fixed in 4.78.3-0.20260112221730-5c030e32a3a9 Patch available GHSA-4r5r-ccr6-q6f6

CPE configurations NVD · 2

CPEVersionsRoleVendor
cpe:2.3:a:fleetdm:fleet:*:*:*:*:*:*:*:*before 4.53.3; 4.75.0 to before 4.75.2; 4.76.0 to before 4.76.2; 4.78.0 to before 4.78.3Vulnerablefleetdm
cpe:2.3:a:fleetdm:fleet:4.77.0:*:*:*:*:*:*:*4.77.0Vulnerablefleetdm
  • cpe:2.3:a:fleetdm:fleet:*:*:*:*:*:*:*:* Versions before 4.53.3; 4.75.0 to before 4.75.2; 4.76.0 to before 4.76.2; 4.78.0 to before 4.78.3 Vulnerable ·fleetdm
  • cpe:2.3:a:fleetdm:fleet:4.77.0:*:*:*:*:*:*:* Versions 4.77.0 Vulnerable ·fleetdm

Remediation

  • Fix · CNA fleet (fleetdm) Fixed in 4.78.3, 4.77.1, 4.76.2, 4.75.2, 4.53.3
  • Fix · GHSA-4r5r-ccr6-q6f6 github.com/fleetdm/fleet (Go) Fixed in 4.78.3 Advisory →
  • Fix · GHSA-4r5r-ccr6-q6f6 github.com/fleetdm/fleet (Go) Fixed in 4.77.1 Advisory →
  • Fix · GHSA-4r5r-ccr6-q6f6 github.com/fleetdm/fleet (Go) Fixed in 4.76.2 Advisory →
  • Fix · GHSA-4r5r-ccr6-q6f6 github.com/fleetdm/fleet (Go) Fixed in 4.75.2 Advisory →
  • Fix · GHSA-4r5r-ccr6-q6f6 github.com/fleetdm/fleet/v4 (Go) Fixed in 4.78.3-0.20260112221730-5c030e32a3a9 Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-23517
  2. 2026-10-03 Alias added: GHSA-4r5r-ccr6-q6f6

References

Patch 1

Advisory 2

Other 2

  • TI-2026-65639 Fleet before 4.87.0 Authentication Bypass via Device Identifiers CVSS 4.0CRITICAL 9.3
  • TI-2026-18942 Fleet has a JWT signature bypass vulnerability in Azure AD MDM enrollment CVSS 4.0CRITICAL 9.3
  • TI-2020-16097 SAML authentication vulnerability in Fleet CVSS 3.1CRITICAL 10.0
  • TI-2026-21066 Fleet server may terminate unexpectedly when handling certain gRPC requests CVSS 4.0HIGH 8.7
  • TI-2026-21065 Fleet's unbounded request body read allows remote Denial of Service CVSS 4.0HIGH 8.7
  • TI-2026-20084 Fleet Windows MDM Azure AD JWT Authentication Bypass CVSS 4.0HIGH 8.2
See all 31 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences