CVE-2026-40208

Name: CVE-2026-40208
Creator: NVD / NIST
Published: 2026-06-25T13:16:39.427+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

LOWCVSS 3.7/10

Last modified Jun 25, 2026

CVE-2026-40208 is a low-severity vulnerability rated 3.7/10 on the CVSS scale. An attacker might be able to delay the processing of DoH3 queries by sending DoH3 GET queries with an invalid DATA frame..

Description

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

Metrics

CVSS 3.1

3.7/10

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

CVSS 3.0

/10

Weakness Enumeration

CWE-705

References

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

Timeline

Published: Jun 25, 2026
Last Modified: Jun 25, 2026
Status: Deferred

Frequently Asked Questions

What is CVE-2026-40208?

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

How severe is CVE-2026-40208?

CVE-2026-40208 has a CVSS score of 3.7/10 (LOW severity).

How do I fix CVE-2026-40208?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2026-40208?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST