CVE-2026-40012

published 2026-06-25

CVE-2026-40012: ECS zero scoped answers are stored in the packet cache while they should not. This impacts only configurations that have ECS enabled;

Priority P4 29 medium 5.3 CVSS 3.1

AV N AC L PR N UI N S U C L I N A N

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

Affected

3 ranges

Vendor	Product	Version range	Fixed in
powerdns	recursor	>= 5.2.0 < 5.2.11	5.2.11
powerdns	recursor	>= 5.3.0 < 5.3.8	5.3.8
powerdns	recursor	>= 5.4.0 < 5.4.3	5.4.3

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CWE-524