CVE-2026-52686 Affecting pdns-recursor package, versions <5.4.4-1
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-DEBIANUNSTABLE-PDNSRECURSOR-18219042
- published23 Jul 2026
- disclosed23 Jul 2026
Introduced: 23 Jul 2026
CVE-2026-52686 (opens in a new tab)How to fix?
Upgrade Debian:unstable pdns-recursor to version 5.4.4-1 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream pdns-recursor package and not the pdns-recursor package as distributed by Debian.
See How to fix? for Debian:unstable relevant fixed versions and status.
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.