CVE-2026-50248

6.5 Moyenne

Publiée le 22/07/2026 à 16:17 · Modifiée le 24/10/2026 à 15:10 · Analysée par le NVD · Source : sep@nlnetlabs.nl

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.

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Produits concernés

NLnet Labs Unbound
Nlnetlabs unbound

Scores CVSS

Version	Score	Source	Vecteur
3.1	6.5 Moyenne	sep@nlnetlabs.nl	`CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:L`

Faiblesses (CWE)

CWE-345

Références

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

Ailleurs

NVD
CVE.org
CIRCL Vulnerability-Lookup
CERT-FR
GitHub Advisories