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CVE-2026-55708

Privacy/configuration issue when adding local data in views through 'unbound-control'

Published: Jul 22, 2026Updated: Jul 24, 2026 Sources: CVE List NVDCWE-1188
3.1LOW
NVD MITRE
EPSS Score
0.1%
Top 95.3%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available
Self-Check
OpenVAS

Description

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.

No summary for this CVE yet.

CVSS Vector Breakdown

AV:LAC:LPR:HUI:RS:UC:LI:LA:N
Exploitability
AV:LAttack Vector
Local
AC:LAttack Complexity
Low
PR:HPrivileges Required
High
UI:RUser Interaction
Required
Scope
S:UScope
Unchanged
Impact
C:LConfidentiality
Low
I:LIntegrity
Low
A:NAvailability
None
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Weaknesses

CWE-1188

Affected Products

nlnetlabs
oss-project
unboundOn-premNetwork Device
Networking Infrastructure / dns-dhcp-ntp
NLnet Labs
oss-projectaka routinator, bcder, unbound
UnboundOn-prem
Networking Infrastructure / dns-dhcp-ntp

Exploitability

Official Patch Available
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References

https://www.nlnetlabs.nl/downloads/unbound/CVE-2026-55708.txt
nlnetlabs.nl

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