Medium severity5.3NVD Advisory· Published Jul 22, 2026· Updated Jul 24, 2026
CVE-2026-50045
CVE-2026-50045
Description
In NLnet Labs Unbound 1.22.0 up to and including 1.25.1, a single client query for a deeply nested name under a DNSSEC-signed parent can cause Unbound to send more upstream packets per client query than the configured 'max-global-quota'. This effectively bypasses a security configuration that limits upstream amplification traffic.
Affected products
4- osv-coords2 versionspkg:rpm/opensuse/unbound&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/unbound&distro=openSUSE%20Tumbleweed
< 1.25.2-160000.1.1+ 1 more
- (no CPE)range: < 1.25.2-160000.1.1
- (no CPE)range: < 1.25.2-1.1
Patches
Vulnerability mechanics
References
1- www.nlnetlabs.nl/downloads/unbound/CVE-2026-50045.txtnvdVendor Advisory
News mentions
1- Nlnetlabs Unbound: 23 Vulnerabilities Disclosed Together in DNSSEC, DoQ, and RPZ HandlingVypr Intelligence · Jul 23, 2026