Vulnerability Details CVE-2026-55708
In NLnet Labs Unbound 1.6.0 up to and including 1.25.1, the 'view_local_data' and 'view_local_datas' commands of 'unbound-control' create a bare local zones tree for an already configured named view when the view is configured with no local data to begin with. However, the creation through the control interface omits adding the default-protected zones (e.g., RFC 1918 reverse, AS112 zones, .onion, .localhost). Once the local zone tree exists without the defaults, every query for a default-protected name from a client mapped to that view escapes to the public DNS via the iterator instead of being answered locally, bypassing local policy expectations.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.001
EPSS Ranking 2.1%
CVSS Severity
CVSS v3 Score 3.1
Products affected by CVE-2026-55708
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cpe:2.3:a:nlnetlabs:unbound:1.10.0
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cpe:2.3:a:nlnetlabs:unbound:1.10.1
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cpe:2.3:a:nlnetlabs:unbound:1.11.0
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cpe:2.3:a:nlnetlabs:unbound:1.12.0
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cpe:2.3:a:nlnetlabs:unbound:1.13.0
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cpe:2.3:a:nlnetlabs:unbound:1.13.1
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cpe:2.3:a:nlnetlabs:unbound:1.13.2
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cpe:2.3:a:nlnetlabs:unbound:1.14.0
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cpe:2.3:a:nlnetlabs:unbound:1.15.0
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cpe:2.3:a:nlnetlabs:unbound:1.16.0
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cpe:2.3:a:nlnetlabs:unbound:1.16.1
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cpe:2.3:a:nlnetlabs:unbound:1.16.2
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cpe:2.3:a:nlnetlabs:unbound:1.16.3
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cpe:2.3:a:nlnetlabs:unbound:1.17.0
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cpe:2.3:a:nlnetlabs:unbound:1.17.1
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cpe:2.3:a:nlnetlabs:unbound:1.18.0
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cpe:2.3:a:nlnetlabs:unbound:1.19.0
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cpe:2.3:a:nlnetlabs:unbound:1.19.1
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cpe:2.3:a:nlnetlabs:unbound:1.19.2
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cpe:2.3:a:nlnetlabs:unbound:1.19.3
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cpe:2.3:a:nlnetlabs:unbound:1.20.0
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cpe:2.3:a:nlnetlabs:unbound:1.21.0
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cpe:2.3:a:nlnetlabs:unbound:1.21.1
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cpe:2.3:a:nlnetlabs:unbound:1.22.0
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cpe:2.3:a:nlnetlabs:unbound:1.23.0
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cpe:2.3:a:nlnetlabs:unbound:1.23.1
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cpe:2.3:a:nlnetlabs:unbound:1.24.0
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cpe:2.3:a:nlnetlabs:unbound:1.24.1
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cpe:2.3:a:nlnetlabs:unbound:1.24.2
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cpe:2.3:a:nlnetlabs:unbound:1.25.0
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cpe:2.3:a:nlnetlabs:unbound:1.25.1
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cpe:2.3:a:nlnetlabs:unbound:1.6.0
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cpe:2.3:a:nlnetlabs:unbound:1.6.1
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cpe:2.3:a:nlnetlabs:unbound:1.6.2
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cpe:2.3:a:nlnetlabs:unbound:1.6.3
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cpe:2.3:a:nlnetlabs:unbound:1.6.4
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cpe:2.3:a:nlnetlabs:unbound:1.6.5
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cpe:2.3:a:nlnetlabs:unbound:1.6.6
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cpe:2.3:a:nlnetlabs:unbound:1.6.6-5
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cpe:2.3:a:nlnetlabs:unbound:1.6.7
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cpe:2.3:a:nlnetlabs:unbound:1.6.8
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cpe:2.3:a:nlnetlabs:unbound:1.7.0
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cpe:2.3:a:nlnetlabs:unbound:1.7.1
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cpe:2.3:a:nlnetlabs:unbound:1.7.2
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cpe:2.3:a:nlnetlabs:unbound:1.7.3
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cpe:2.3:a:nlnetlabs:unbound:1.8.0
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cpe:2.3:a:nlnetlabs:unbound:1.8.1
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cpe:2.3:a:nlnetlabs:unbound:1.8.2
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cpe:2.3:a:nlnetlabs:unbound:1.8.3
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cpe:2.3:a:nlnetlabs:unbound:1.9.0
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cpe:2.3:a:nlnetlabs:unbound:1.9.2
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cpe:2.3:a:nlnetlabs:unbound:1.9.3
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cpe:2.3:a:nlnetlabs:unbound:1.9.4
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cpe:2.3:a:nlnetlabs:unbound:1.9.5
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cpe:2.3:a:nlnetlabs:unbound:1.9.6