CVE-2026-50248

CVSS Score & Metrics

Base Score

6.5 / 10

Vector String

                                        CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:L                                    

Vulnerability Description

In NLnet Labs Unbound 1.7.0 up to and including 1.25.1, when an auth/rpz zone has a configured primary hostname that resolves to BOGUS A/AAAA, it is still considered as a possible XFR endpoint. A malicious actor that can spoof the hostname's A/AAAA record (no valid RRSIG required) becomes the zone's XFR primary and can replaces the entire zone/the resolver's entire response policy.

Vulnerability Details

Published Date

July 22, 2026

Last Modified

July 22, 2026

CWE ID

CWE-345

Source

NVD

Vendor

NLnet Labs

Product

Unbound

External References

https://www.nlnetlabs.nl/downloads/unbound/CVE-2026-50248.txt

CVSS Score & Metrics

Vulnerability Description

Vulnerability Details

External References

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