HIGH 7.5 Microsoft

CVE-2026-1519

Excessive NSEC3 iterations cause high CPU load during insecure delegation validation

Microsoft Security Update 2026-Aug: Excessive NSEC3 iterations cause high CPU load during insecure delegation validation

Affected Products

cbl2 bind 9.16.50-3 on CBL Mariner 2.0
azl3 bind 9.20.18-1 on Azure Linux 3.0
cbl2 bind 9.16.50-3
cbl2 dhcp 4.4.3.P1-3 on CBL Mariner 2.0

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-1519
https://nvd.nist.gov/vuln/detail/CVE-2026-1519

Published: 2026-08-06 · Source: Microsoft · Feed updated: 2026-08-10

This high severity vulnerability with a CVSS score of 7.5 was published on 2026-08-06 via Microsoft. Affected: cbl2 bind 9.16.50-3 on CBL Mariner 2.0, azl3 bind 9.20.18-1 on Azure Linux 3.0, cbl2 bind 9.16.50-3 and 1 more.

vulnfeed aggregates 8893 vulnerabilities from NVD, CISA KEV, Ubuntu, Debian, Red Hat, Kubernetes, Exploit-DB, OSS-Security, GitHub and OpenStack — updated every 4 hours.