CVE-2026-42390

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Source
https://cve.org/CVERecord?id=CVE-2026-42390
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-42390.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-42390
Downstream
Published
2026-06-25T13:01:08.394Z
Modified
2026-07-20T21:03:25.192011Z
Severity
  • 5.3 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N CVSS Calculator
Summary
ZONEMD validation can be bypassed
Details

An invalid zone might pass ZONEMD validation while it should not. This is only relevant if ZoneToCache is configured with ZONEMD validation.

Database specific 
{
    "cna_assigner": "OX",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/42xxx/CVE-2026-42390.json"
}
References

Affected packages

Git / github.com/powerdns/pdns

Affected ranges

Type
GIT
Repo
https://github.com/powerdns/pdns
Events
Introduced
c95adbda8ce519923dfdbe7947d82a2692e18af9
Fixed
9f875a6231f22b189c3f03a3c97a910079c47115
Database specific 
{
    "source": "AFFECTED_FIELD",
    "extracted_events": [
        {
            "introduced": "5.4.0"
        },
        {
            "fixed": "5.4.3"
        }
    ]
}

Affected versions

rec-5.*
rec-5.4.0
rec-5.4.0-rc1
rec-5.4.2

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-42390.json"
vanir_signatures 
[
    {
        "source": "https://github.com/powerdns/pdns/commit/9f875a6231f22b189c3f03a3c97a910079c47115",
        "signature_type": "Line",
        "signature_version": "v1",
        "digest": {
            "line_hashes": [
                "71329078264894497200496962563892013914",
                "314272552250244648567858200824068156160",
                "254546730563956205117486205788166146028",
                "128063049265375810574434524958835793185",
                "51075072797667112938322960446173147917",
                "1769984556611710233346913634038737002",
                "120133930855658610965004980948818375267",
                "126102207894564060240255718651762163470",
                "147386961934458703471621645482809402359",
                "164795306008441146365693274181779490437"
            ],
            "threshold": 0.9
        },
        "id": "CVE-2026-42390-9363d976",
        "target": {
            "file": "pdns/recursordist/syncres.cc"
        },
        "deprecated": false
    }
]
vanir_signatures_modified 
"2026-07-20T21:03:25Z"