Incorrect Authorization Affecting kubernetes-dns-node-cache package, versions <1.26.8-r3


Severity

Recommended
0.0
high
0
10

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Threat Intelligence

EPSS
0.01% (4th percentile)

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  • Snyk IDSNYK-WOLFILATEST-KUBERNETESDNSNODECACHE-16423839
  • published5 May 2026
  • disclosed5 May 2026

Introduced: 5 May 2026

NewCVE-2026-33489  (opens in a new tab)
CWE-863  (opens in a new tab)

How to fix?

Upgrade Wolfi kubernetes-dns-node-cache to version 1.26.8-r3 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream kubernetes-dns-node-cache package and not the kubernetes-dns-node-cache package as distributed by Wolfi. See How to fix? for Wolfi relevant fixed versions and status.

CoreDNS is a DNS server that chains plugins. In versions prior to 1.14.3, the transfer plugin can select the wrong ACL stanza when both a parent zone and a more-specific subzone are configured. The longestMatch() function in plugin/transfer/transfer.go uses a lexicographic string comparison instead of an actual longest-suffix match to select the winning zone. As a result, a permissive parent-zone transfer rule can override a restrictive subzone rule depending on zone name ordering (e.g., "example.org." > "a.example.org." lexicographically). This allows an unauthorized remote client to perform AXFR/IXFR for the subzone and retrieve its full zone contents. This issue has been fixed in version 1.14.3.

CVSS Base Scores

version 3.1