CVE-2026-23998
- Source
- https://cve.org/CVERecord?id=CVE-2026-23998
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-23998.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2026-23998
- Aliases
- Downstream
- Related
- Published
- 2026-05-14T18:48:38.765Z
- Modified
- 2026-08-12T03:51:42.529959607Z
- Severity
-
- 8.2 (High) CVSS_V4 - CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N CVSS Calculator
- Summary
- Fleet has a Windows MDM management endpoint authentication bypass
- Details
-
Fleet is open source device management software. Prior to version 4.81.0, a vulnerability in Fleet’s Windows MDM management endpoint could allow requests to be processed without proper client certificate validation. In certain circumstances, this could allow an attacker to impersonate an enrolled Windows device and retrieve sensitive configuration data. Fleet’s Windows MDM management endpoint relies on mutual TLS (mTLS) client certificates to authenticate enrolled devices. In affected versions, requests that did not present a client certificate could be incorrectly treated as trusted. As a result, an attacker with prior knowledge of a valid enrolled device identifier could potentially impersonate that device and receive configuration payloads intended for it. These payloads may contain sensitive information such as Wi-Fi or VPN configuration data, certificates, or other secrets delivered through MDM profiles. This issue does not allow enrollment of new devices, administrative access to Fleet, or compromise of the Fleet control plane. Impact is limited to the targeted Windows device. Version 4.81.0 contains a patch. If an immediate upgrade is not possible, affected Fleet users should temporarily disable Windows MDM.
- Database specific
{ "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/23xxx/CVE-2026-23998.json", "cna_assigner": "GitHub_M", "cwe_ids": [ "CWE-295" ] }- References
Affected packages
Git / github.com/fleetdm/fleet
Affected ranges
- Type
- GIT
- Repo
- https://github.com/fleetdm/fleet
- Events
-
Introduced0 Unknown introduced commit / All previous commits are affectedFixed
- Database specific
-
Show details
{ "source": [ "AFFECTED_FIELD", "CPE_RANGE", "REFERENCES" ], "cpe": "cpe:2.3:a:fleetdm:fleet:*:*:*:*:*:*:*:*", "extracted_events": [ { "introduced": "0" }, { "fixed": "4.81.0" } ] }
Affected versions
1.*
1.0.0
1.0.0-rc1
1.0.0-rc2
1.0.1
1.0.2
1.0.3
1.0.4
1.0.5
1.0.6
1.0.7
2.*
2.0.0
2.0.0-rc1
2.0.0-rc2
2.0.0-rc3
2.0.0-rc4
2.0.0-rc5
2.0.1
2.0.2
2.1.0
2.1.1
2.1.2
2.2.0
2.3.0
2.4.0
2.5.0
2.6.0
3.*
3.0.0
3.1.0
3.10.0
3.10.1
3.11.0
3.12.0
3.13.0
3.2.0
3.3.0
3.4.0
3.5.0
3.5.1
3.6.0
3.7.0
3.7.1
3.7.2
3.7.3
3.8.0
3.9.0
fleet-v4.*
fleet-v4.10.0
fleet-v4.11.0
fleet-v4.12.0
fleet-v4.13.0
fleet-v4.14.0
fleet-v4.15.0
fleet-v4.16.0
fleet-v4.17.0
fleet-v4.18.0
fleet-v4.19.0
fleet-v4.2.0
fleet-v4.2.2
fleet-v4.20.0
fleet-v4.22.0
fleet-v4.23.0
fleet-v4.24.0
fleet-v4.25.0
fleet-v4.26.0
fleet-v4.27.0
fleet-v4.28.0
fleet-v4.29.0
fleet-v4.3.0
fleet-v4.3.1
fleet-v4.30.0
fleet-v4.31.0
fleet-v4.32.0
fleet-v4.33.0
fleet-v4.34.0
fleet-v4.35.0
fleet-v4.36.0
fleet-v4.37.0
fleet-v4.38.0
fleet-v4.39.0
fleet-v4.4.0
fleet-v4.40.0
fleet-v4.41.0
fleet-v4.43.0
fleet-v4.45.0
fleet-v4.47.0
fleet-v4.48.0
fleet-v4.49.0
fleet-v4.5.0
fleet-v4.50.0
fleet-v4.51.0
fleet-v4.6.0
fleet-v4.6.1
fleet-v4.7.0
fleet-v4.8.0
Other
fleetctl-docker-deps-20260113
fleetctl-docker-deps-20260129
orbit-test-build
fleetctl-docker-deps-v4.*
fleetctl-docker-deps-v4.60.0
fleetctl-docker-deps-v4.76.1
fleetd-android-v1.*
fleetd-android-v1.0.0
fleetd-chrome-v1.*
fleetd-chrome-v1.1.0-beta
fleetd-chrome-v1.1.1-beta
fleetd-chrome-v1.1.3
fleetd-chrome-v1.1.3-beta
fleetd-chrome-v1.2.0
fleetd-chrome-v1.2.0-beta
fleetd-chrome-v1.2.1-beta
fleetd-chrome-v1.3.0
fleetd-chrome-v1.3.1
orbit-v0.*
orbit-v0.0.11
orbit-v0.0.12
orbit-v0.0.13
orbit-v0.0.4
orbit-v0.0.5
orbit-v0.0.6
orbit-v0.0.7
orbit-v0.0.9
orbit-v1.*
orbit-v1.0.0
orbit-v1.1.0
orbit-v1.10.0
orbit-v1.11.0
orbit-v1.12.0
orbit-v1.12.1
orbit-v1.13.0
orbit-v1.14.0
orbit-v1.15.0
orbit-v1.16.0
orbit-v1.16.0-2
orbit-v1.17.0
orbit-v1.18.0-RC
orbit-v1.18.2
orbit-v1.18.3
orbit-v1.2.0-rc1
orbit-v1.20.0
orbit-v1.3.0
orbit-v1.3.0-rc
orbit-v1.4.0
orbit-v1.4.0-rc
orbit-v1.4.1
orbit-v1.41.0
orbit-v1.42.0
orbit-v1.43.0
orbit-v1.45.0
orbit-v1.48.0
orbit-v1.49.0
orbit-v1.5.0
orbit-v1.50.0
orbit-v1.51.0
orbit-v1.7.0
orbit-v1.8.0
orbit-v1.9.0
orbit-v1.9.1
rc-fleetctl-test-v4.*
rc-fleetctl-test-v4.63.0
tf-mod-addon-bfldf-v1.*
tf-mod-addon-bfldf-v1.1.0
tf-mod-addon-byo-file-carving-target-account-v1.*
tf-mod-addon-byo-file-carving-target-account-v1.0.0
tf-mod-addon-byo-file-carving-target-account-v1.1.0
tf-mod-addon-byo-file-carving-v1.*
tf-mod-addon-byo-file-carving-v1.0.0
tf-mod-addon-byo-file-carving-v1.1.0
tf-mod-addon-byo-firehose-logging-destination-firehose-v1.*
tf-mod-addon-byo-firehose-logging-destination-firehose-v1.0.0
tf-mod-addon-byo-firehose-logging-destination-firehose-v1.1.0
tf-mod-addon-byo-firehose-logging-destination-firehose-v2.*
tf-mod-addon-byo-firehose-logging-destination-firehose-v2.0.0
tf-mod-addon-byo-firehose-logging-destination-firehose-v2.0.1
tf-mod-addon-byo-firehose-logging-destination-firehose-v2.0.2
tf-mod-addon-byo-firehose-logging-destination-firehose-v2.0.3
tf-mod-addon-byo-firehose-logging-destination-target-account-v1.*
tf-mod-addon-byo-firehose-logging-destination-target-account-v1.0.0
tf-mod-addon-byo-firehose-logging-destination-target-account-v1.1.0
tf-mod-addon-byo-kinesis-logging-destination-kinesis-v1.*
tf-mod-addon-byo-kinesis-logging-destination-kinesis-v1.0.0
tf-mod-addon-byo-kinesis-logging-destination-kinesis-v1.0.1
tf-mod-addon-byo-kinesis-logging-destination-target-account-v1.*
tf-mod-addon-byo-kinesis-logging-destination-target-account-v1.0.0
tf-mod-addon-external-vuln-scans-v1.*
tf-mod-addon-external-vuln-scans-v1.0.0
tf-mod-addon-external-vuln-scans-v2.*
tf-mod-addon-external-vuln-scans-v2.0.0
tf-mod-addon-external-vuln-scans-v2.0.1
tf-mod-addon-external-vuln-scans-v2.0.2
tf-mod-addon-external-vuln-scans-v2.1.0
tf-mod-addon-external-vuln-scans-v2.2.0
tf-mod-addon-geolite2-v1.*
tf-mod-addon-geolite2-v1.0.0
tf-mod-addon-logging-alb-v1.*
tf-mod-addon-logging-alb-v1.0.0
tf-mod-addon-logging-alb-v1.0.1
tf-mod-addon-logging-alb-v1.0.2
tf-mod-addon-logging-alb-v1.1.0
tf-mod-addon-logging-alb-v1.1.1
tf-mod-addon-logging-alb-v1.2.0
tf-mod-addon-logging-destination-firehose-v1.*
tf-mod-addon-logging-destination-firehose-v1.0.0
tf-mod-addon-logging-destination-firehose-v1.1.0
tf-mod-addon-logging-destination-firehose-v1.1.1
tf-mod-addon-mdm-v1.*
tf-mod-addon-mdm-v1.0.0
tf-mod-addon-mdm-v1.1.0
tf-mod-addon-mdm-v1.2.0
tf-mod-addon-mdm-v1.2.1
tf-mod-addon-mdm-v1.2.2
tf-mod-addon-mdm-v1.3.0
tf-mod-addon-mdm-v1.4.0
tf-mod-addon-mdm-v1.4.1
tf-mod-addon-mdm-v1.5.0
tf-mod-addon-mdm-v2.*
tf-mod-addon-mdm-v2.0.0
tf-mod-addon-mdmproxy-v1.*
tf-mod-addon-mdmproxy-v1.0.0
tf-mod-addon-mdmproxy-v1.0.1
tf-mod-addon-migrations-v1.*
tf-mod-addon-migrations-v1.0.0
tf-mod-addon-migrations-v2.*
tf-mod-addon-migrations-v2.0.0
tf-mod-addon-migrations-v2.0.1
tf-mod-addon-monitoring-v1.*
tf-mod-addon-monitoring-v1.0.0
tf-mod-addon-monitoring-v1.1.0
tf-mod-addon-monitoring-v1.1.1
tf-mod-addon-monitoring-v1.1.2
tf-mod-addon-monitoring-v1.1.3
tf-mod-addon-monitoring-v1.2.0
tf-mod-addon-monitoring-v1.3.0
tf-mod-addon-monitoring-v1.4.0
tf-mod-addon-monitoring-v1.4.1
tf-mod-addon-monitoring-v1.5.0
tf-mod-addon-monitoring-v1.5.1
tf-mod-addon-osquery-carve-split-account-osquery-carve-v1.*
tf-mod-addon-osquery-carve-split-account-osquery-carve-v1.0.0
tf-mod-addon-osquery-carve-split-account-osquery-carve-v1.1.0
tf-mod-addon-osquery-carve-split-account-split-account-v1.*
tf-mod-addon-osquery-carve-split-account-split-account-v1.0.0
tf-mod-addon-osquery-carve-split-account-split-account-v1.1.0
tf-mod-addon-osquery-carve-v1.*
tf-mod-addon-osquery-carve-v1.0.0
tf-mod-addon-osquery-carve-v1.0.1
tf-mod-addon-osquery-carve-v1.1.0
tf-mod-addon-osquery-perf-v1.*
tf-mod-addon-osquery-perf-v1.0.0
tf-mod-addon-saml-auth-proxy-v1.*
tf-mod-addon-saml-auth-proxy-v1.0.0
tf-mod-addon-saml-auth-proxy-v1.1.0
tf-mod-addon-saml-auth-proxy-v1.2.0
tf-mod-addon-saml-auth-proxy-v1.3.0
tf-mod-addon-ses-v1.*
tf-mod-addon-ses-v1.0.0
tf-mod-addon-ses-v1.1.0
tf-mod-addon-ses-v1.2.0
tf-mod-addon-vuln-processing-v1.*
tf-mod-addon-vuln-processing-v1.0.0
tf-mod-addon-vuln-processing-v1.1.0
tf-mod-addon-waf-alb-v1.*
tf-mod-addon-waf-alb-v1.0.0
tf-mod-addon-waf-alb-v2.*
tf-mod-addon-waf-alb-v2.0.0
tf-mod-byo-db-v1.*
tf-mod-byo-db-v1.0.0
tf-mod-byo-db-v1.1.0
tf-mod-byo-db-v1.2.0
tf-mod-byo-db-v1.3.0
tf-mod-byo-db-v1.3.1
tf-mod-byo-db-v1.3.2
tf-mod-byo-db-v1.4.0
tf-mod-byo-db-v1.5.0
tf-mod-byo-db-v1.5.1
tf-mod-byo-db-v1.6.0
tf-mod-byo-db-v1.7.0
tf-mod-byo-db-v1.7.1
tf-mod-byo-db-v1.8.0
tf-mod-byo-db-v1.9.0
tf-mod-byo-ecs-v1.*
tf-mod-byo-ecs-v1.0.0
tf-mod-byo-ecs-v1.1.0
tf-mod-byo-ecs-v1.2.0
tf-mod-byo-ecs-v1.3.0
tf-mod-byo-ecs-v1.4.0
tf-mod-byo-ecs-v1.4.1
tf-mod-byo-ecs-v1.5.0
tf-mod-byo-ecs-v1.6.0
tf-mod-byo-ecs-v1.6.1
tf-mod-byo-ecs-v1.7.0
tf-mod-byo-ecs-v1.8.0
tf-mod-byo-ecs-v1.8.1
tf-mod-byo-vpc-v1.*
tf-mod-byo-vpc-v1.0.0
tf-mod-byo-vpc-v1.1.0
tf-mod-byo-vpc-v1.10.0
tf-mod-byo-vpc-v1.10.1
tf-mod-byo-vpc-v1.11.0
tf-mod-byo-vpc-v1.12.0
tf-mod-byo-vpc-v1.12.1
tf-mod-byo-vpc-v1.2.0
tf-mod-byo-vpc-v1.3.0
tf-mod-byo-vpc-v1.4.0
tf-mod-byo-vpc-v1.5.0
tf-mod-byo-vpc-v1.6.0
tf-mod-byo-vpc-v1.6.1
tf-mod-byo-vpc-v1.7.0
tf-mod-byo-vpc-v1.7.1
tf-mod-byo-vpc-v1.8.0
tf-mod-byo-vpc-v1.8.1
tf-mod-byo-vpc-v1.8.2
tf-mod-byo-vpc-v1.8.3
tf-mod-byo-vpc-v1.9.0
tf-mod-root-v1.*
tf-mod-root-v1.0.0
tf-mod-root-v1.1.0
tf-mod-root-v1.1.1
tf-mod-root-v1.10.0
tf-mod-root-v1.11.0
tf-mod-root-v1.11.1
tf-mod-root-v1.2.0
tf-mod-root-v1.3.0
tf-mod-root-v1.4.0
tf-mod-root-v1.5.0
tf-mod-root-v1.5.1
tf-mod-root-v1.6.0
tf-mod-root-v1.6.1
tf-mod-root-v1.7.0
tf-mod-root-v1.7.1
tf-mod-root-v1.7.2
tf-mod-root-v1.7.3
tf-mod-root-v1.8.0
tf-mod-root-v1.9.0
tf-mod-root-v1.9.1
tf-mod-root-v1.9.2
v0.*
v0.0.4
v0.0.5
v0.0.6
v0.0.7
v4.*
v4.0.0
v4.0.0-rc3
v4.0.1
v4.1.0
v4.28.0
v4.36.0
v4.37.0
v4.43.4