CVE-2026-50045 Affecting unbound package, versions <1.25.2-r0


Severity

Recommended
low

Based on default assessment until relevant scores are available.

Threat Intelligence

EPSS
0.46% (38th percentile)

Do your applications use this vulnerable package?

In a few clicks we can analyze your entire application and see what components are vulnerable in your application, and suggest you quick fixes.

Test your applications
  • Snyk IDSNYK-ALPINE324-UNBOUND-18371827
  • published29 Jul 2026
  • disclosed22 Jul 2026

Introduced: 22 Jul 2026

CVE-2026-50045  (opens in a new tab)

How to fix?

Upgrade Alpine:3.24 unbound to version 1.25.2-r0 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream unbound package and not the unbound package as distributed by Alpine. See How to fix? for Alpine:3.24 relevant fixed versions and status.

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 Base Scores

version 3.1