CVE-2026-77119
A validly signed NSEC3 from an unrelated sibling zone may be accepted as an insecurity proof, downgrading a secure delegation and letting a forged unsigned answer through. This issue affects BIND 9 versions 9.11.0 through 9.18.50, 9.20.0 through 9.20.27, 9.21.0 through 9.21.25, 9.11.3-S1 through 9.18.50-S1, and 9.20.9-S1 through 9.20.27-S1.
- Score
- CVSS 3.1 5.9 Medium
- Status
- Awaiting Analysis - security-officer@isc.org
- Published
- 2026-09-16
- Last modified
- 2026-10-26
- Weaknesses
- CWE-346
Affected products
References
- https://kb.isc.org/docs/cve-2026-77119
- https://downloads.isc.org/isc/bind9/9.20.29
- https://downloads.isc.org/isc/bind9/9.21.26
