CVE-2026-50045CWE-406

'max-global-quota' reset by DNSSEC validation restarts

Medium · published July 22, 2026

CVSS v3.1
5.3
EPSS
0%
Percentile
19.9
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
5.3 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
CVSS v4.0
Not supplied
EPSS
0.00278 · 19.9th percentile
Weakness
CWE-406 · Insufficient Control of Network Message Volume (Network Amplification)
Published
2026-07-22T13:07Z
EPSS history
Timeline
  • 22 JUL 13:07Z
    'max-global-quota' reset by DNSSEC validation restarts
    cvelistv5