CVE-2026-52688

RRSIGs with too few labels can lead to bypass of DNSSEC wildcard validation

State: Published
Severity: 7.5 High
Published: Jul 23, 2026
Updated: Jul 23, 2026
Reserved: Jun 8, 2026

Description

RRSIGs with too few labels can lead to bypass of DNSSEC wildcard validation

Scores

CVSS	Score	Vector	Source
3.1	7.5 High	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N	OX

Weaknesses

CWE-345 Insufficient Verification of Data Authenticity
CWE-295 Improper Certificate Validation

Affected Products

Product	Versions
RecursorPowerDNS	5.2.0 to before 5.2.12Affected 5.3.0 to before 5.3.9Affected 5.4.0 to before 5.4.4Affected

References

https://docs.powerdns.com/recursor/security-advisories/powerdns-advisory-powerdns-2026-10.html

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