Vulnerability in Powerdns Dnsdist

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.

EPSS: 0.002 (10.7th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 3.7 (Low). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L.

Affected products

Powerdns Dnsdist — versions 1.9.0, 2.0.0

Weakness classification (CWE)

CWE-705

References

security@open-xchange.com

Frequently asked questions

What is CVE-2026-40208?: CVE-2026-40208 is a low-severity vulnerability in Powerdns Dnsdist, classified under CWE-705. CVSS score: 3.7/10. Published 2026-06-25.
How severe is CVE-2026-40208?: Low severity. CVSS v3 base score is 3.7 out of 10.