CVE-2026-42389

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Source
https://cve.org/CVERecord?id=CVE-2026-42389
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-42389.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-42389
Downstream
Published
2026-06-25T13:16:45.245Z
Modified
2026-07-08T08:13:17.585139841Z
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
Reject more queries with invalid header values
Details

This fix provides extra hardening for the 5.4.x branch by doing extra validation of incoming answers from authoritative servers.

Database specific 
{
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/42xxx/CVE-2026-42389.json",
    "cna_assigner": "OX"
}
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-2026-42389.json"