What is CVE-2026-52690?

CVE-2026-52690 is a medium-severity vulnerability in Powerdns Recursor, classified under Authentication Bypass by Spoofing. CVSS score: 5.9/10. Published 2026-06-25.

How severe is CVE-2026-52690?

Medium severity. CVSS v3 base score is 5.9 out of 10.

Vulnerability in Powerdns Recursor

CVE-2026-52690

Spoofing replies to Recursor might mark an IP of an authoritative server as not supporting EDNS, causing valdiation of DNSSEC records served by that server to fail.

EPSS: 0.003 (26.4th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.9 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H.

Affected products

Powerdns Recursor — versions 5.2.0, 5.3.0, 5.4.0

Weakness classification (CWE)

CWE-290 — Authentication Bypass by Spoofing

References

security@open-xchange.com

Frequently asked questions

What is CVE-2026-52690?: CVE-2026-52690 is a medium-severity vulnerability in Powerdns Recursor, classified under Authentication Bypass by Spoofing. CVSS score: 5.9/10. Published 2026-06-25.
How severe is CVE-2026-52690?: Medium severity. CVSS v3 base score is 5.9 out of 10.