Back to overview

CVE-2026-50045

MEDIUM
5.3
CVSS 3.1
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.

Metadata

CVE ID
CVE-2026-50045
State
PUBLISHED
Assigner
NLnet Labs
Reserved
2026-06-22 12:27 UTC
Published
2026-07-22 13:07 UTC
Last updated
2026-07-22 13:07 UTC
Primary CWE
CWE-406
CWE-406: Insufficient Control of Network Message Volume (Net…
Vendor / Product
NLnet Labs / Unbound
Sources
cve.org  ·  NVD

Severity & Metrics

5.3 MEDIUM CVSS 3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Affected products (1)
VendorProductPlatformVersions
NLnet Labs Unbound — 1.22.0 < 1.25.2
Weakness (CWE)
CWESourceDescription
CWE-406 cna CWE-406: Insufficient Control of Network Message Volume (Network Amplification)
CVSS scores (1)
ScoreSeverityVersionSourceVector
5.3 MEDIUM 3.1 cna CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
References (1)
Back to overview