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CVE-2026-52686

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.
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:6eb95b8128efa7d512de4081f108e995913b14562b1e5d1b309fbf7746c81d37
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
1

Preserved source conflicts

No provider value was silently selected as the winner.

cwe · 2 assertions

{"description":"Insufficient Verification of Data Authenticity","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:9ce1fb792b2c7b1f73a365a972c50ce2ccb34c640a39a138e28c2fefa0b0dffe · sha256:cdd3a885e1358541… · /containers/cna/problemTypes/0/descriptions/0

{"cweId":"CWE-347","description":"CWE-347 Improper Verification of Cryptographic Signature","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:9ce1fb792b2c7b1f73a365a972c50ce2ccb34c640a39a138e28c2fefa0b0dffe · sha256:cdd3a885e1358541… · /containers/adp/0/problemTypes/0/descriptions/0

Affected products and versions

1 source assertion
{"collectionURL":"https://repo.powerdns.com/","defaultStatus":"unaffected","modules":["DNSSEC validation"],"packageName":"pdns-recursor","product":"Recursor","programFiles":["syncres.cc"],"repo":"https://github.com/PowerDNS/pdns","vendor":"PowerDNS","versions":[{"lessThan":"5.2.12","status":"affected","version":"5.2.0","versionType":"semver"},{"lessThan":"5.3.9","status":"affected","version":"5.3.0","versionType":"semver"},{"lessThan":"5.4.4","status":"affected","version":"5.4.0","versionType":"semver"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:9ce1fb792b2c7b1f73a365a972c50ce2ccb34c640a39a138e28c2fefa0b0dffe · sha256:cdd3a885e1358541… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"HIGH","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":3.7,"baseSeverity":"LOW","confidentialityImpact":"NONE","integrityImpact":"LOW","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:9ce1fb792b2c7b1f73a365a972c50ce2ccb34c640a39a138e28c2fefa0b0dffe · sha256:cdd3a885e1358541… · /containers/cna/metrics/0/cvssV3_1

CWE assertions

2 source assertions
{"description":"Insufficient Verification of Data Authenticity","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:9ce1fb792b2c7b1f73a365a972c50ce2ccb34c640a39a138e28c2fefa0b0dffe · sha256:cdd3a885e1358541… · /containers/cna/problemTypes/0/descriptions/0
{"cweId":"CWE-347","description":"CWE-347 Improper Verification of Cryptographic Signature","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:9ce1fb792b2c7b1f73a365a972c50ce2ccb34c640a39a138e28c2fefa0b0dffe · sha256:cdd3a885e1358541… · /containers/adp/0/problemTypes/0/descriptions/0

Source references

1 source assertion
{"url":"https://docs.powerdns.com/recursor/security-advisories/powerdns-advisory-powerdns-2026-10.html"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:9ce1fb792b2c7b1f73a365a972c50ce2ccb34c640a39a138e28c2fefa0b0dffe · sha256:cdd3a885e1358541… · /containers/cna/references/0

Attribution and limitations

  • CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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