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CVE-2026-40208

Denial of service via DoH3 queries

Published: Jun 25, 2026Updated: Jun 25, 2026 Sources: CVE List NVDCWE-705

No Known Exploits

No Fix Available

Description

An attacker might be able to delay the processing of DoH3 queries by sending DoH3 GET queries with an invalid DATA frame.

No summary for this CVE yet.

CVSS Vector Breakdown

Exploitability

AV:NAttack Vector

Network

AC:HAttack Complexity

High

PR:NPrivileges Required

None

UI:NUser Interaction

None

Scope

S:UScope

Unchanged

Impact

C:NConfidentiality

None

I:NIntegrity

None

A:LAvailability

Low

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Weaknesses

Affected Products

oss-project·DKaka powerdns authoritative, dnsdist, powerdns recursor

DNSdistOn-prem

Networking Infrastructure / dns-dhcp-ntp

Exploitability

No known exploits, KEV entries, or remediation guidance available for this vulnerability yet.

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References

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

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