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CVE-2026-52686

LOW
3.7
CVSS 3.1
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.

Metadata

CVE ID
CVE-2026-52686
State
PUBLISHED
Assigner
OX
Reserved
2026-06-08 08:05 UTC
Published
2026-07-23 08:03 UTC
Last updated
2026-07-23 13:56 UTC
Primary CWE
CWE-347
CWE-347 Improper Verification of Cryptographic Signature
Vendor / Product
PowerDNS / Recursor
Sources
cve.org  ·  NVD

Severity & Metrics

3.7 LOW CVSS 3.1
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N
SSVC — CISA Coordinator
Exploitation
none
Automatable
no
Tech. Impact
partial
Affected products (1)
VendorProductPlatformVersions
PowerDNS Recursor — 5.2.0 < 5.2.12, 5.3.0 < 5.3.9, 5.4.0 < 5.4.4
Weakness (CWE)
CWESourceDescription
— cna Insufficient Verification of Data Authenticity
CWE-347 adp CWE-347 Improper Verification of Cryptographic Signature
CVSS scores (1)
ScoreSeverityVersionSourceVector
3.7 LOW 3.1 cna CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N
References (1)
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