CVE-2026-55708
Fixed in a distro release EPSS <1%CVSS 3.1
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.
Products: NLnet Labs unbound
Distro releases
| Release | Package | Fixed in |
|---|---|---|
| Alpine 3.22 | unbound | 1.25.2-r0 |
| Alpine 3.23 | unbound | 1.25.2-r0 |
| Alpine 3.24 | unbound | 1.25.2-r0 |
| Amazon Linux 2023 | python3-unbound | 1.17.1-1.amzn2023.0.13 |
| Amazon Linux 2023 | unbound | 1.17.1-1.amzn2023.0.13 |
| Amazon Linux 2023 | unbound-anchor | 1.17.1-1.amzn2023.0.13 |
| Amazon Linux 2023 | unbound-devel | 1.17.1-1.amzn2023.0.13 |
| Amazon Linux 2023 | unbound-libs | 1.17.1-1.amzn2023.0.13 |
| Amazon Linux 2023 | unbound-utils | 1.17.1-1.amzn2023.0.13 |
| Debian 12 | unbound | no fix |
| Debian 13 | unbound | 1.26.1-0+deb13u1 |
| Debian 14 | unbound | 1.25.2-1 |
| Red Hat hummingbird 1 | python3-unbound | 0:1.25.2-0.1.hum1 |
| Red Hat hummingbird 1 | unbound | 0:1.25.2-0.1.hum1 |
| Red Hat hummingbird 1 | unbound-anchor | 0:1.25.2-0.1.hum1 |
| Red Hat hummingbird 1 | unbound-devel | 0:1.25.2-0.1.hum1 |
| Red Hat hummingbird 1 | unbound-dracut | 0:1.25.2-0.1.hum1 |
| Red Hat hummingbird 1 | unbound-libs | 0:1.25.2-0.1.hum1 |
| Red Hat hummingbird 1 | unbound-munin | 0:1.25.2-0.1.hum1 |
| Red Hat hummingbird 1 | unbound-utils | 0:1.25.2-0.1.hum1 |
| SUSE Linux Enterprise High Performance Computing 15 SP4-ESPOS | unbound | 1.25.2-150100.10.28.1 |
| SUSE Linux Enterprise High Performance Computing 15 SP4-LTSS | unbound | 1.25.2-150100.10.28.1 |
| SUSE Linux Enterprise High Performance Computing 15 SP5-ESPOS | unbound | 1.25.2-150100.10.28.1 |
| SUSE Linux Enterprise High Performance Computing 15 SP5-LTSS | unbound | 1.25.2-150100.10.28.1 |
| SUSE Linux Enterprise Micro 5.5 | unbound | 1.25.2-150100.10.28.1 |
| SUSE Linux Enterprise Module for Basesystem 15 SP7 | unbound | 1.25.2-150600.23.19.1 |
| SUSE Linux Enterprise Module for Package Hub 15 SP7 | unbound | 1.25.2-150600.23.19.1 |
| SUSE Linux Enterprise Server 15 SP4-LTSS | unbound | 1.25.2-150100.10.28.1 |
| SUSE Linux Enterprise Server 15 SP5-LTSS | unbound | 1.25.2-150100.10.28.1 |
| SUSE Linux Enterprise Server 15 SP6-LTSS | unbound | 1.25.2-150600.23.19.1 |
| SUSE Linux Enterprise Server 16.0 | unbound | 1.25.2-160000.1.1 |
| SUSE Linux Enterprise Server for SAP Applications 15 SP4 | unbound | 1.25.2-150100.10.28.1 |
| SUSE Linux Enterprise Server for SAP Applications 15 SP5 | unbound | 1.25.2-150100.10.28.1 |
| SUSE Linux Enterprise Server for SAP Applications 15 SP6 | unbound | 1.25.2-150600.23.19.1 |
| SUSE Linux Enterprise Server for SAP applications 16.0 | unbound | 1.25.2-160000.1.1 |
| SUSE Linux Micro 6.0 | unbound | 1.25.2-1.1 |
| SUSE Linux Micro 6.1 | unbound | 1.25.2-slfo.1.1_1.1 |
| SUSE Linux Micro 6.2 | unbound | 1.25.2-160000.1.1 |
| Ubuntu 22.04 LTS | unbound | no fix |
| Ubuntu 24.04 LTS | unbound | no fix |
| Ubuntu 26.04 LTS | unbound | no fix |
| Ubuntu 26.10 | unbound | no fix |
| Ubuntu Pro 14.04 LTS | unbound | no fix |
| Ubuntu Pro 16.04 LTS | unbound | no fix |
| Ubuntu Pro 18.04 LTS | unbound | no fix |
| Ubuntu Pro 20.04 LTS | unbound | no fix |
| openSUSE Leap 16.0 | unbound | 1.25.2-160000.1.1 |
| openSUSE Tumbleweed | unbound | 1.25.2-1.1 |