CVE-2026-50045

MediumCVSS 5.3/10Last modified Oct 24, 2026

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.

Metrics

CVSS 3.1 5.3/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

Weakness enumeration

CWE-406

Affected software

Vendor	Product	Versions
NLnet Labs	Unbound	>= 1.22.0, < 1.25.2

References

https://www.nlnetlabs.nl/downloads/unbound/CVE-2026-50045.txtVendor Advisory

Timeline

Published: Jul 22, 2026
Last modified: Oct 24, 2026
NVD status: Analyzed

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