CVE-2026-52688

EUVD-2026-47930
RRSIGs with too few labels can lead to bypass of DNSSEC wildcard validation
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
OXCNA
7.5 HIGH
NETWORK
LOW
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Base Score
CVSS 3.x
EPSS Score
Percentile: 2.26%
Early Detection
Affected products identified ahead of NVD analysis through intelligence sources.
VendorProductVersionSource
powerdnsrecursor
5.2.0 ≤
𝑥
< 5.2.12
CNA
powerdnsrecursor
5.3.0 ≤
𝑥
< 5.3.9
CNA
powerdnsrecursor
5.4.0 ≤
𝑥
< 5.4.4
CNA
Debian logo
Debian Releases
Debian Product
Codename
pdns-recursor
bookworm
vulnerable
bookworm (security)
vulnerable
forky
5.4.5-1
fixed
sid
5.4.6-1
fixed
trixie
vulnerable
trixie (security)
5.2.13-0+deb13u1
fixed
Ubuntu logo
Ubuntu Releases
Ubuntu Product
Codename
pdns-recursor
bionic
needs-triage
focal
needs-triage
jammy
needs-triage
noble
needs-triage
resolute
needs-triage
xenial
needs-triage
Common Weakness Enumeration
References
https://docs.powerdns.com/recursor/security-advisories/powerdns-advisory-powerdns-2026-10.html