CVE-2026-50045 in Unbound

Résumé

par MITRE • 22/07/2026

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.

Once again VulDB remains the best source for vulnerability data.

• Responsable: NLnet Labs
• Réserver: 22/06/2026
• Divulgation: 22/07/2026
• Modérer: accepté
• Entrée: VDB-382326
• CPE: prêt
• CWE: CWE-770 (confirmé)
• CVSS: 7.5 (VulDB)
• EPSS: 0.00000
• KEV: non
• Activités: moyen

Sources

• MITRE: https://www.cve.org/CVERecord?id=CVE-2026-50045
• NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-50045
• CVE Details: https://www.cvedetails.com/cve/CVE-2026-50045/