Description

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.

INFO

Published Date :

2026-05-05T19:13:48.461Z

Last Modified :

2026-05-05T19:43:06.361Z

Source :

GitHub_M
AFFECTED PRODUCTS

The following products are affected by CVE-2026-33489 vulnerability.

Vendors Products
Coredns.io
  • Coredns
REFERENCES

Here, you will find a curated list of external links that provide in-depth information to CVE-2026-33489.

URL Resource
https://github.com/coredns/coredns/releases/tag/v1.14.3 cve-icon cve-icon
https://github.com/coredns/coredns/security/advisories/GHSA-h8mm-c463-wjq3 cve-icon cve-icon cve-icon
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Detailed values of each vector for above chart.
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