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PatchSiren cyber security CVE debrief

CVE-2026-52688 PowerDNS CVE debrief

A vulnerability in RRSIGs with too few labels can lead to bypass of DNSSEC wildcard validation. This issue has a CVSS score of 7.5 and is considered HIGH severity. The CVE record was published on 2026-07-23T09:16:27.080Z and was last modified on 2026-10-24T13:10:00.147Z. DNS administrators and security teams should assess exposure and verify validation mechanisms to prevent potential bypass of DNSSEC wildcard validation. The vulnerability occurs in RRSIGs with too few labels, potentially allowing bypass of DNSSEC wildcard validation. The CVSS vector is CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N. Limited information is available about affected versions and remediation. The NVD is

Vendor
PowerDNS
Product
Recursor
CVSS
HIGH 7.5
CISA KEV
Not listed in stored evidence
Original CVE published
2026-07-23
Original CVE updated
2026-10-24
Advisory published
2026-07-23
Advisory updated
2026-10-24

Who should care

DNS administrators and security teams responsible for DNSSEC validation should assess exposure and verify validation mechanisms to prevent potential bypass of DNSSEC wildcard validation. The vulnerability occurs in RRSIGs with too few labels, potentially allowing bypass of DNSSEC wildcard validation. This issue has a CVSS score of 7.5 and is considered HIGH severity.

Why it matters

This vulnerability has a CVSS score of 7.5 and is considered HIGH severity. DNS administrators and security teams should assess exposure and verify validation mechanisms to prevent potential bypass of DNSSEC wildcard validation.

  • Potential bypass of DNSSEC wildcard validation
  • Increased risk of DNS spoofing
  • Need for verification of validation mechanisms
  • Potential impact on DNS security

Technical summary

The vulnerability occurs in RRSIGs with too few labels, potentially allowing bypass of DNSSEC wildcard validation. The CVSS vector is CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N. This issue has a CVSS score of 7.5 and is considered HIGH severity. DNS administrators and security teams should assess exposure and verify validation mechanisms to prevent potential bypass of DNSSEC wildcard validation.

Defensive priority

DNS administrators should assess exposure and verify validation mechanisms.

Recommended defensive actions

  • Assess exposure by reviewing DNSSEC wildcard validation mechanisms
  • Verify validation mechanisms to prevent bypass
  • Monitor for potential exploitation attempts

Evidence notes

The NVD entry is currently Awaiting Analysis. Limited information is available about affected versions and remediation. DNS administrators and security teams should assess exposure and verify validation mechanisms to prevent potential bypass of DNSSEC wildcard validation. The vulnerability occurs in RRSIGs with too few labels, potentially allowing bypass of DNSSEC wildcard validation.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-52688 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-52688

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-52688 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-52688

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.