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Fencer Vulns
high 8.1

CVE-2026-23517 json

Fleet has an Access Control vulnerability in debug/pprof endpoints

published 2026-01-20 9 mo ago modified 2026-06-17 4 mo ago also EUVD-2026-3349 , GHSA-4r5r-ccr6-q6f6 , GO-2026-4334

cvss
8.1
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
0.3%
EPSS 0.3% chance of exploitation in 30 days, percentile 21%
public exploits
0
none known

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.

Patch / fix

  • go github.com/fleetdm/fleet 4.75.2, 4.76.2, 4.77.1, 4.78.3
  • go github.com/fleetdm/fleet/v4 4.75.2, 4.76.2, 4.77.1, 4.78.3, 4.78.3-0.20260112221730-5c030e32a3a9
  • fleetdm fleet 4.53.3, 4.75.2, 4.76.2, 4.77.1, 4.78.3
  • govulncheck-vulndb openSUSE Leap 15.6 0.0.20260205T172317-150000.1.146.1

suse advisories SUSE-SU-2026:0403-1

  • govulncheck-vulndb openSUSE Leap 16.0 0.0.20260723T184607-160000.1.1

opensuse advisories openSUSE-SU-2026:21483-1

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
total
Assessed
9 mo ago

Exploit prediction

0.29% chance of exploitation in the next 30 days, higher than 21% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 4.0 6.3 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
CNA 4.0 6.3 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/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
NVD 3.1 8.1 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H

Affected packages

ecosystem package affected fixed in
go github.com/fleetdm/fleet
>=4.78.0, <4.78.3
>=4.77.0, <4.77.1
>=4.76.0, <4.76.2
>=4.75.0, <4.75.2
4.78.3
4.77.1
4.76.2
4.75.2
go github.com/fleetdm/fleet/v4
<4.78.3-0.20260112221730-5c030e32a3a9
>=4.75.0, <4.75.2
>=4.76.0, <4.76.2
>=4.77.0, <4.77.1
>=4.78.0, <4.78.3
4.78.3-0.20260112221730-5c030e32a3a9
4.75.2
4.76.2
4.77.1
4.78.3

Affected products

  • fleetdm fleet

Classification

Weakness

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.