CVE-2026-33489

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Source
https://cve.org/CVERecord?id=CVE-2026-33489
Import Source
https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-33489.json
JSON Data
https://api.test.osv.dev/v1/vulns/CVE-2026-33489
Aliases
Downstream
Related
Published
2026-05-05T19:13:48.461Z
Modified
2026-06-25T23:11:53.648060541Z
Severity
  • 8.2 (High) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N CVSS Calculator
Summary
CoreDNS transfer plugin subzone ACL bypass via lexicographic zone comparison
Details

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.

Database specific 
{
    "cna_assigner": "GitHub_M",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/33xxx/CVE-2026-33489.json",
    "cwe_ids": [
        "CWE-863"
    ]
}
References

Affected packages

Git / github.com/coredns/coredns

Affected ranges

Type
GIT
Repo
https://github.com/coredns/coredns
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
17fceec6d93fd1dde5ba6888c363f131ff6d647f
Database specific 
{
    "source": [
        "AFFECTED_FIELD",
        "CPE_RANGE",
        "REFERENCES"
    ],
    "extracted_events": [
        {
            "introduced": "0"
        },
        {
            "fixed": "1.14.3"
        },
        {
            "introduced": "0"
        },
        {
            "fixed": "1.14.3"
        }
    ],
    "cpe": "cpe:2.3:a:coredns.io:coredns:*:*:*:*:*:*:*:*"
}

Affected versions

v0.*
v0.9.10
v0.9.9
Other
v001
v002
v003
v004
v005
v006
v007
v008
v009
v010
v011
v1.*
v1.0.0
v1.0.1
v1.0.2
v1.0.3
v1.0.5
v1.0.6
v1.1.0
v1.1.1
v1.1.2
v1.1.3
v1.1.4
v1.10.0
v1.10.1
v1.11.0
v1.11.1
v1.11.3
v1.11.4
v1.12.0
v1.12.1
v1.12.2
v1.12.3
v1.12.4
v1.13.0
v1.13.1
v1.13.2
v1.14.0
v1.14.1
v1.14.2
v1.2.0
v1.2.1
v1.2.2
v1.2.3
v1.2.4
v1.2.5
v1.2.6
v1.3.0
v1.3.1
v1.4.0
v1.5.0
v1.5.1
v1.5.2
v1.6.0
v1.6.1
v1.6.2
v1.6.3
v1.6.4
v1.6.5
v1.6.6
v1.6.7
v1.6.8
v1.6.9
v1.7.0
v1.7.1
v1.8.0
v1.8.1
v1.8.2
v1.8.3
v1.8.4
v1.8.5
v1.8.6
v1.8.7
v1.9.0
v1.9.1
v1.9.2
v1.9.3
v1.9.4

Database specific

source 
"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-33489.json"