CVE-2026-40012

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Source
https://cve.org/CVERecord?id=CVE-2026-40012
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-40012.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-40012
Downstream
Published
2026-06-25T12:58:51.987Z
Modified
2026-07-08T08:13:12.555339247Z
Severity
  • 5.3 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N CVSS Calculator
Summary
Information about ECS zero scoped answers might leak to clients that use a specific ECS
Details

ECS zero scoped answers are stored in the packet cache while they should not. This impacts only configurations that have ECS enabled;

Database specific 
{
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/40xxx/CVE-2026-40012.json",
    "cna_assigner": "OX"
}
References

Affected packages

Git / github.com/powerdns/pdns

Affected ranges

Type
GIT
Repo
https://github.com/powerdns/pdns
Events
Introduced
544037cd123e8662877b5dc0b7963f5a094a2faf
Fixed
8565b266486a2c347f57985dc7dd704e41c7e1cf
Introduced
ff33413345dc6a826ff0f37f0c78cd60cdf15689
Fixed
b2f7567b5e2ba8d13ea0bf5c8ecd47ee2db14330
Introduced
c95adbda8ce519923dfdbe7947d82a2692e18af9
Fixed
9f875a6231f22b189c3f03a3c97a910079c47115
Database specific 
{
    "source": "AFFECTED_FIELD",
    "extracted_events": [
        {
            "introduced": "5.2.0"
        },
        {
            "fixed": "5.2.11"
        },
        {
            "introduced": "5.3.0"
        },
        {
            "fixed": "5.3.8"
        },
        {
            "introduced": "5.4.0"
        },
        {
            "fixed": "5.4.3"
        }
    ]
}

Affected versions

rec-5.*
rec-5.2.0
rec-5.2.10
rec-5.2.2
rec-5.2.4
rec-5.2.5
rec-5.2.6
rec-5.2.8
rec-5.3.0
rec-5.3.1
rec-5.3.4
rec-5.3.7
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-2026-40012.json"