CVE-2026-40012

MEDIUM 5.3

Information about ECS zero scoped answers might leak to clients that use a specific ECS

CVSS Score

5.3

EPSS Score

0.0%

EPSS Percentile

0th

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

Stay Ahead of the Next One

Be the first to know when new medium vulnerabilities affecting powerdns recursor are published — delivered to Slack, Telegram or Discord.

Get Free Alerts → Free · No credit card · 60 sec setup

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

None

Availability

None

PowerDNS / Recursor

5.2.0 < 5.2.11 5.3.0 < 5.3.8 5.4.0 < 5.4.3

Danial Mahadzir