CVE-2026-50248

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Source
https://cve.org/CVERecord?id=CVE-2026-50248
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-50248.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-50248
Downstream
Related
Published
2026-07-22T14:17:20.370Z
Modified
2026-07-27T14:06:43.397805Z
Severity
  • 6.5 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:L CVSS Calculator
Summary
[none]
Details

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.

References

Affected packages

Git / github.com/nlnetlabs/unbound

Affected ranges

Type
GIT
Repo
https://github.com/nlnetlabs/unbound
Events
Introduced
50bd12d6953ef1bca9e5f87cd1ebb5e4b7688241
Fixed
c33ad1b1a21e48bfe4f140e90252a9be1b0c5745
Database specific 
{
    "cpe": "cpe:2.3:a:nlnetlabs:unbound:*:*:*:*:*:*:*:*",
    "extracted_events": [
        {
            "introduced": "1.7.0"
        },
        {
            "fixed": "1.25.2"
        }
    ],
    "source": "CPE_RANGE"
}

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-50248.json"