CVE-2026-40011

LOW

PowerDNS DNSdist - Prometheus Denial of Service via Crafted DNS Queries

Title source: rule

Description

An attacker sending a large number of crafted DNS queries might be able to trigger a dynamic block being inserted with a value causing invalid output to be produced in the prometheus endpoint. The prometheus endpoint will then be rejected by the scraper until the dynamic block expires.

References (1)

Core 1

Core References

https://www.dnsdist.org/security-advisories/powerdns-advisory-for-dnsdist-2026-09.html

Scores

CVSS v3 3.7

EPSS 0.0015

EPSS Percentile 4.9%

Attack Vector NETWORK

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

CISA SSVC

Vulnrichment

Exploitation none

Automatable no

Technical Impact partial

Details

CWE

CWE-116

Status published

Products (2)

PowerDNS/DNSdist 1.9.0 - 1.9.15

PowerDNS/DNSdist 2.0.0 - 2.0.7

Published Jun 25, 2026

Tracked Since Jun 25, 2026