CVE-2026-1519: Excessive NSEC3 iterations cause high CPU load during insecure delegation validation
Overview
- Severity
- High (CVSS 7.5)
- CVSS Vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- Exploit Status
- Not Exploited
- Patch Tuesday
- 2026-Mar
- Released
- 2026-03-29
- Last Updated
- 2026-04-24
- EPSS Score
- 0.03% (percentile: 9.5%)
Affected Products (3)
Open Source Software
- cbl2 bind 9.16.50-3 on CBL Mariner 2.0
- azl3 bind 9.20.18-1 on Azure Linux 3.0
- cbl2 dhcp 4.4.3.P1-3 on CBL Mariner 2.0
Revision History
- 2026-03-29: Information published.
- 2026-03-30: Information published.
- 2026-03-31: Information published.
- 2026-04-15: Information published.
- 2026-04-24: Information published.