CVE-2026-40011 - Vulnerability Details - OpenCVE

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.

No CVSS v4.0

Attack Vector Network

Attack Complexity High

Privileges Required None

Scope Unchanged

Confidentiality Impact None

Integrity Impact Low

Availability Impact None

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Exploitation none

Automatable no

Technical Impact partial

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions

PowerDNS

DNSdist

unaffected

Version	Status	Constraints
`1.9.0`	affected	< 1.9.15
`2.0.0`	affected	< 2.0.7

No data.

No data.

No data.

Project Subscriptions

No data.

Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References

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

History

Thu, 25 Jun 2026 14:30:00 +0000

Type	Values Removed	Values Added
Weaknesses		CWE-116
Metrics		ssvc `{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}`

Thu, 25 Jun 2026 13:00:00 +0000

Type	Values Removed	Values Added
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.
Title		Prometheus denial of service via crafted DNS queries
References		https://www.dnsdist.org/security-advisories/powerdns-advisory-for-dnsdist-2026-09.html
Metrics		cvssV3_1 `{'score': 3.7, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N'}`

Projects

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MITRE

Status: PUBLISHED

Assigner: OX

Published: 2026-06-25T12:22:19.248Z

Updated: 2026-06-25T13:23:46.840Z

Reserved: 2026-04-08T09:59:59.341Z

Link: CVE-2026-40011

Vulnrichment

Updated: 2026-06-25T13:23:04.450Z

NVD

No data.

Redhat

No data.

OpenCVE Enrichment

No data.

Weaknesses

CWE-116

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