Vulnerability Details CVE-2026-40304
zrok is software for sharing web services, files, and network resources. Prior to version 2.0.1, the unaccess handler (controller/unaccess.go) contains a logical error in its ownership guard: when a frontend record has environment_id = NULL (the marker for admin-created global frontends), the condition short-circuits to false and allows the deletion to proceed without any ownership verification. A non-admin user who knows a global frontend token can call DELETE /api/v2/unaccess with any of their own environment IDs and permanently delete the global frontend, taking down all public shares routed through it. Version 2.0.1 patches the issue.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.0
EPSS Ranking 2.3%
CVSS Severity
CVSS v3 Score 5.3
References
Products affected by CVE-2026-40304
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cpe:2.3:a:netfoundry:zrok:0.2.0
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cpe:2.3:a:netfoundry:zrok:0.2.0.1
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cpe:2.3:a:netfoundry:zrok:0.2.0.2
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cpe:2.3:a:netfoundry:zrok:0.2.0.3
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cpe:2.3:a:netfoundry:zrok:0.2.0.4
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cpe:2.3:a:netfoundry:zrok:0.2.1
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cpe:2.3:a:netfoundry:zrok:0.2.10
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cpe:2.3:a:netfoundry:zrok:0.2.11
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cpe:2.3:a:netfoundry:zrok:0.2.12
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cpe:2.3:a:netfoundry:zrok:0.2.13
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cpe:2.3:a:netfoundry:zrok:0.2.14
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cpe:2.3:a:netfoundry:zrok:0.2.15
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cpe:2.3:a:netfoundry:zrok:0.2.16
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cpe:2.3:a:netfoundry:zrok:0.2.17
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cpe:2.3:a:netfoundry:zrok:0.2.18
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cpe:2.3:a:netfoundry:zrok:0.2.2
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cpe:2.3:a:netfoundry:zrok:0.2.3
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cpe:2.3:a:netfoundry:zrok:0.2.4
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cpe:2.3:a:netfoundry:zrok:0.2.5
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cpe:2.3:a:netfoundry:zrok:0.2.6
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cpe:2.3:a:netfoundry:zrok:0.2.7
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cpe:2.3:a:netfoundry:zrok:0.2.8
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cpe:2.3:a:netfoundry:zrok:0.2.9
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cpe:2.3:a:netfoundry:zrok:0.3.0
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cpe:2.3:a:netfoundry:zrok:0.3.1
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cpe:2.3:a:netfoundry:zrok:0.3.2
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cpe:2.3:a:netfoundry:zrok:0.3.4
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cpe:2.3:a:netfoundry:zrok:0.3.5
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cpe:2.3:a:netfoundry:zrok:0.3.6
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cpe:2.3:a:netfoundry:zrok:0.4.0
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cpe:2.3:a:netfoundry:zrok:0.4.1
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cpe:2.3:a:netfoundry:zrok:0.4.10
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cpe:2.3:a:netfoundry:zrok:0.4.11
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cpe:2.3:a:netfoundry:zrok:0.4.12
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cpe:2.3:a:netfoundry:zrok:0.4.13
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cpe:2.3:a:netfoundry:zrok:0.4.14
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cpe:2.3:a:netfoundry:zrok:0.4.15
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cpe:2.3:a:netfoundry:zrok:0.4.16
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cpe:2.3:a:netfoundry:zrok:0.4.17
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cpe:2.3:a:netfoundry:zrok:0.4.18
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cpe:2.3:a:netfoundry:zrok:0.4.19
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cpe:2.3:a:netfoundry:zrok:0.4.2
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cpe:2.3:a:netfoundry:zrok:0.4.20
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cpe:2.3:a:netfoundry:zrok:0.4.21
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cpe:2.3:a:netfoundry:zrok:0.4.22
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cpe:2.3:a:netfoundry:zrok:0.4.23
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cpe:2.3:a:netfoundry:zrok:0.4.24
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cpe:2.3:a:netfoundry:zrok:0.4.25
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cpe:2.3:a:netfoundry:zrok:0.4.26
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cpe:2.3:a:netfoundry:zrok:0.4.27
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cpe:2.3:a:netfoundry:zrok:0.4.28
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cpe:2.3:a:netfoundry:zrok:0.4.29
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cpe:2.3:a:netfoundry:zrok:0.4.3
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cpe:2.3:a:netfoundry:zrok:0.4.30
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cpe:2.3:a:netfoundry:zrok:0.4.31
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cpe:2.3:a:netfoundry:zrok:0.4.32
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cpe:2.3:a:netfoundry:zrok:0.4.33
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cpe:2.3:a:netfoundry:zrok:0.4.34
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cpe:2.3:a:netfoundry:zrok:0.4.35
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cpe:2.3:a:netfoundry:zrok:0.4.36
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cpe:2.3:a:netfoundry:zrok:0.4.37
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cpe:2.3:a:netfoundry:zrok:0.4.38
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cpe:2.3:a:netfoundry:zrok:0.4.39
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cpe:2.3:a:netfoundry:zrok:0.4.4
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cpe:2.3:a:netfoundry:zrok:0.4.40
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cpe:2.3:a:netfoundry:zrok:0.4.41
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cpe:2.3:a:netfoundry:zrok:0.4.42
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cpe:2.3:a:netfoundry:zrok:0.4.43
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cpe:2.3:a:netfoundry:zrok:0.4.44
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cpe:2.3:a:netfoundry:zrok:0.4.45
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cpe:2.3:a:netfoundry:zrok:0.4.46
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cpe:2.3:a:netfoundry:zrok:0.4.47
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cpe:2.3:a:netfoundry:zrok:0.4.48
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cpe:2.3:a:netfoundry:zrok:0.4.49
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cpe:2.3:a:netfoundry:zrok:0.4.5
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cpe:2.3:a:netfoundry:zrok:0.4.6
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cpe:2.3:a:netfoundry:zrok:0.4.7
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cpe:2.3:a:netfoundry:zrok:0.4.8
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cpe:2.3:a:netfoundry:zrok:0.4.9
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cpe:2.3:a:netfoundry:zrok:1.0.0
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cpe:2.3:a:netfoundry:zrok:1.0.1
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cpe:2.3:a:netfoundry:zrok:1.0.2
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cpe:2.3:a:netfoundry:zrok:1.0.3
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cpe:2.3:a:netfoundry:zrok:1.0.4
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cpe:2.3:a:netfoundry:zrok:1.0.5
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cpe:2.3:a:netfoundry:zrok:1.0.6
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cpe:2.3:a:netfoundry:zrok:1.0.7
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cpe:2.3:a:netfoundry:zrok:1.0.8
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cpe:2.3:a:netfoundry:zrok:1.1.0
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cpe:2.3:a:netfoundry:zrok:1.1.1
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cpe:2.3:a:netfoundry:zrok:1.1.10
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cpe:2.3:a:netfoundry:zrok:1.1.11
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cpe:2.3:a:netfoundry:zrok:1.1.2
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cpe:2.3:a:netfoundry:zrok:1.1.3
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cpe:2.3:a:netfoundry:zrok:1.1.4
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cpe:2.3:a:netfoundry:zrok:1.1.5
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cpe:2.3:a:netfoundry:zrok:1.1.6
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cpe:2.3:a:netfoundry:zrok:1.1.7
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cpe:2.3:a:netfoundry:zrok:1.1.8
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cpe:2.3:a:netfoundry:zrok:1.1.9
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cpe:2.3:a:netfoundry:zrok:2.0.0