CVE-2026-50045
'max-global-quota' reset by DNSSEC validation restarts
- State
- Published
- Severity
- 5.3 Medium
- Published
- Jul 22, 2026
- Updated
- Jul 22, 2026
- Reserved
- Jun 22, 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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 5.3 Medium | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L | NLnet Labs |
Weaknesses
- CWE-406 Insufficient Control of Network Message Volume (Network Amplification)
Affected Products
| Product | Versions |
|---|---|
UnboundNLnet Labs |
|
References
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