Riskcovery

CVE-2026-52686

Wildcard CNAME proof validation bypass

State
Published
Severity
3.7 Low
Published
Jul 23, 2026
Updated
Jul 23, 2026
Reserved
Jun 8, 2026

Read the record on cve.org

Description

The issue is a DNSSEC validation bypass where wildcard expansion proofs (NSEC/NSEC3 records) are accepted without signature validation when the wildcard answer is a CNAME or DNAME record.

Scores

CVSSScoreVectorSource
3.13.7 LowCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:NOX

Weaknesses

  • CWE-347 Improper Verification of Cryptographic Signature

Affected Products

ProductVersions
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

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