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CVE PROGRAM SOURCE RECORD8.6 High

CVE-2026-13321

DNSSEC Validation Bypass via Out-of-Zone NSEC Next Field

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Status
Published
Published
Updated
Assigning organization
isc

Description

The BIND resolver accepts validly-signed NSEC records where the "Next Domain Name" field points outside the signer's zone. This issue affects BIND 9 versions 9.11.0 through 9.18.50, 9.20.0 through 9.20.24, 9.21.0 through 9.21.23, 9.11.3-S1 through 9.18.50-S1, and 9.20.9-S1 through 9.20.24-S1.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

ISC BIND 9

Default version status: unaffected

  • 9.11.0 to ≤ 9.18.50affected
  • 9.20.0 to ≤ 9.20.24affected
  • 9.21.0 to ≤ 9.21.23affected
  • 9.11.3-S1 to ≤ 9.18.50-S1affected
  • 9.20.9-S1 to ≤ 9.20.24-S1affected

References