VulnerabilityAnalyzed
CVE-2026-50045
This effectively bypasses a security configuration that limits upstream amplification traffic.
MEDIUM 5.3EPSS 0.28%
Does this matter?
Lower severity and a low EPSS score (0.28%). Track it; it rarely justifies an emergency change on its own.
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.
- CVSS 3.1
- 5.3 MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
- EPSS
- 0.28% probability · 20th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-406
- Affected
- nlnetlabs/unbound
- Source
- sep@nlnetlabs.nl
References
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.