CVE-2026-52690

EUVD-2026-39360
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.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
OXCNA
5.9 MEDIUM
NETWORK
HIGH
NONE
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Base Score
CVSS 3.x
EPSS Score
Percentile: Unknown
Early Detection
Affected products identified ahead of NVD analysis through intelligence sources.
VendorProductVersionSource
powerdnsrecursor
5.2.0 ≤
𝑥
< 5.2.11
CNA
powerdnsrecursor
5.3.0 ≤
𝑥
< 5.3.8
CNA
powerdnsrecursor
5.4.0 ≤
𝑥
< 5.4.3
CNA
Debian logo
Debian Releases
Debian Product
Codename
pdns-recursor
bookworm
vulnerable
bookworm (security)
vulnerable
bullseye
vulnerable
forky
vulnerable
sid
vulnerable
trixie
vulnerable
trixie (security)
5.2.11-0+deb13u1
fixed
Common Weakness Enumeration
References
https://docs.powerdns.com/recursor/security-advisories/powerdns-advisory-powerdns-2026-08.html