CVE-2026-40011

Prometheus denial of service via crafted DNS queries

LOW

3.7

CVSS Score

Published: June 25, 2026 at 12:22 PM UTC

Updated: October 25, 2026 at 11:10 PM UTC

2 products affected across 1 vendorDNSdistAuthoritative

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Severity

LOW3.7

Exploit prediction

EPSS 0.2%

SSVC

No known exploit

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

DNSdist · Powerdns

90%

1.9.0 ≤ v < 1.9.152.0.0 ≤ v < 2.0.71.9.0 2.0.0

Affected range stops below 1.9.15, so it looks safe — our inference, not a vendor statement

Affected range stops below 2.0.7, so it looks safe — our inference, not a vendor statement

Authoritative · Powerdns

85%

All versions

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (1)

Source: cverecord

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

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

3.7LOWOX

Attack Vector: NETWORK
Complexity: HIGH
Privileges: NONE
User Interaction: NONE
Scope: UNCHANGED
Confidentiality: NONE
Integrity: LOW
Availability: NONE

Vector?

Quick Info

StatusDEFERRED

CWE

CWE-116

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