Bug 2506131 (CVE-2026-55708) - CVE-2026-55708 unbound: Unbound: Information disclosure due to local policy bypass via unbound-control
Summary: CVE-2026-55708 unbound: Unbound: Information disclosure due to local policy b...
Keywords:
Status: NEW
Alias: CVE-2026-55708
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
low
low
Target Milestone: ---
Assignee: Product Security
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-07-22 14:01 UTC by OSIDB Bzimport
Modified: 2026-08-26 12:19 UTC (History)
17 users (show)

Fixed In Version:
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Description OSIDB Bzimport 2026-07-22 14:01:29 UTC
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.


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