{"id":"CVE-2026-77119","published":"2026-09-16T15:17:46.427","lastModified":"2026-09-17T19:16:59.490","description":"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.\nThis 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.","cvssScore":5.9,"cvssSeverity":"MEDIUM","cvssVector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N","cwes":["CWE-346"],"vendors":[],"products":[],"references":[{"url":"https://downloads.isc.org/isc/bind9/9.20.29","tags":[]},{"url":"https://downloads.isc.org/isc/bind9/9.21.26","tags":[]},{"url":"https://kb.isc.org/docs/cve-2026-77119","tags":[]}],"exploitRefs":[],"hasPoc":false,"ai":null}