Vulnerability Report

CVE-2026-55708

Title: NLnet Labs Unbound View Local Data Bypass

Other

Proof Of Concept

No public PoC currently indexed for CVE-2026-55708.

CWE Category CWE-1188
Published Date Jul 22, 2026
Modified Date Jul 24, 2026
Exploit Status Not Found
Score 3.1 CVSS v3.1
Exploit Probability (EPSS)
0.12%

Vulnerability Summary

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.

Impacted Vendors

F
fedoraproject 1
N
nlnetlabs 1

Reference Links

https://www.nlnetlabs.nl/downloads/unbound/CVE-2026-55708.txt
CVSS v3.1
Source Entity [email protected]
Severity LOW
3.1
Attack Vector
LOCAL
Complexity
LOW
Privileges
N/A
Interaction
REQUIRED
Confidentiality
N/A
Integrity
N/A
Availability
N/A
Scope
UNCHANGED
RAW VECTOR CVSS:3.1/AV:L/AC:L/PR:H/UI:R/S:U/C:L/I:L/A:N

Associated Attack Patterns (CAPEC)

Total: Patterns

CVE-2026-55708 Exploits & PoCs (Proof Of Concept)

No public PoCs found in our database for this CVE.

MODIFIED

Vulnerability data updated via NVD.

MODIFIED

Vulnerability data updated via NVD.

MODIFIED

Vulnerability data updated via NVD.

MODIFIED

Vulnerability data updated via NVD.

Attack Vector Matrix

Access Vector LOCAL
Complexity LOW
Privileges N/A
Interaction REQUIRED
CVSS Vector String CVSS:3.1/AV:L/AC:L/PR:H/UI:R/S:U/C:L/I:L/A:N

Affected Stack

No specific products linked.