CVE-2026-11721 Affecting bind-plugins package, versions <9.20.26-r0


Severity

Recommended
0.0
high
0
10

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Threat Intelligence

EPSS
0.39% (32nd percentile)

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  • Snyk IDSNYK-MINIMOSLATEST-BINDPLUGINS-18373317
  • published29 Jul 2026
  • disclosed22 Jul 2026

Introduced: 22 Jul 2026

NewCVE-2026-11721  (opens in a new tab)

How to fix?

Upgrade Minimos:latest bind-plugins to version 9.20.26-r0 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream bind-plugins package and not the bind-plugins package as distributed by Minimos. See How to fix? for Minimos:latest relevant fixed versions and status.

It is possible for an attacker's zone to respond to a query with an RRSIG that has a smaller number of labels than the zone in which the RRSIG is contained. This causes named to produce a wildcard name for a zone that is shorter than the attacker's zone, which can result in cache poisoning. For this attack to have any effect, the resolver under attack must have set synth-from-dnssec yes; (which is the default). 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.

CVSS Base Scores

version 3.1