# CVE-2026-52686: pdns-recursor: The issue is a DNSSEC validation bypass where wildcard expansion proofs (NSEC/NSEC3 records) are accepted without sig...

CVE-2026-52686 is fixed in pdns-recursor on 1 platform, first by DEBIAN-CVE-2026-52686, released July 23, 2026. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2026-52686
- Priority: Routine
- CVSS: 3.7 (low)
- EPSS: 0.0016
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Jul 23, 2026

## 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.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | pdns-recursor Debian 13.5 (trixie) | 5.2.12-0+deb13u1 | [DEBIAN-CVE-2026-52686](https://patchblox.com/security/data/fix/linux/debian-cve-2026-52686.md) | Jul 23, 2026 |
| Linux | pdns-recursor Debian 14 | 5.4.4-1 | [DEBIAN-CVE-2026-52686](https://patchblox.com/security/data/fix/linux/debian-cve-2026-52686.md) | Jul 23, 2026 |

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Data as of 2026-11-08T13:06:02Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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