Is CVE-2026-33489 actively exploited?

No active exploitation of CVE-2026-33489 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-33489 be exploited remotely?

Yes. CVE-2026-33489 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-33489?

CVE-2026-33489 has a CVSS score of 7.5 (HIGH).

HOME VULNERABILITIESCVE-2026-33489

HIGH

CVE-2026-33489

CWE-863Published: May 5, 2026· Updated: May 8, 2026

7.5

CVSS v3.1

EPSS:0.04%probability of exploitation in 30 daysPercentile:12.2th

Official 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.

NVD Source

Technical Analysis

CVE-2026-33489 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), with a CVSS base score of 7.5.