CVE Explorer

CVE-2026-23998

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,

Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:85b728fc92e07fdc928bd380758b713c1812b1e29a12f6845a73fb0a8d821de8

Known exploited

Not asserted

Disputed

Stale source

Conflicts

Affected products and versions

1 source assertion

{"product":"fleet","vendor":"fleetdm","versions":[{"status":"affected","version":"< 4.81.0"}]}

cve_program_cvelist_v5affected
urn:baitaphish:normalized-source-record:v2:174b90183da8bb7bd1f4b6d1711bf8a7e758bc759df95118d22c6bd29d2071cc · sha256:84a248fe264c2037… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion

{"metric":{"attackComplexity":"HIGH","attackRequirements":"NONE","attackVector":"NETWORK","baseScore":8.2,"baseSeverity":"HIGH","privilegesRequired":"NONE","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"NONE","vectorString":"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","version":"4.0","vulnAvailabilityImpact":"NONE","vulnConfidentialityImpact":"HIGH","vulnIntegrityImpact":"NONE"},"metric_type":"cvssV4_0"}

cve_program_cvelist_v5cvss
urn:baitaphish:normalized-source-record:v2:174b90183da8bb7bd1f4b6d1711bf8a7e758bc759df95118d22c6bd29d2071cc · sha256:84a248fe264c2037… · /containers/cna/metrics/0/cvssV4_0

CWE assertions

1 source assertion

{"cweId":"CWE-295","description":"CWE-295: Improper Certificate Validation","lang":"en","type":"CWE"}

cve_program_cvelist_v5cwe
urn:baitaphish:normalized-source-record:v2:174b90183da8bb7bd1f4b6d1711bf8a7e758bc759df95118d22c6bd29d2071cc · sha256:84a248fe264c2037… · /containers/cna/problemTypes/0/descriptions/0

Source references

2 source assertions

{"name":"https://github.com/fleetdm/fleet/releases/tag/fleet-v4.81.0","tags":["x_refsource_MISC"],"url":"https://github.com/fleetdm/fleet/releases/tag/fleet-v4.81.0"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:174b90183da8bb7bd1f4b6d1711bf8a7e758bc759df95118d22c6bd29d2071cc · sha256:84a248fe264c2037… · /containers/cna/references/1

{"name":"https://github.com/fleetdm/fleet/security/advisories/GHSA-2rc4-7jc6-qffh","tags":["x_refsource_CONFIRM"],"url":"https://github.com/fleetdm/fleet/security/advisories/GHSA-2rc4-7jc6-qffh"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:174b90183da8bb7bd1f4b6d1711bf8a7e758bc759df95118d22c6bd29d2071cc · sha256:84a248fe264c2037… · /containers/cna/references/0

Attribution and limitations

CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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