# CVE-2026-52688: pdns-recursor: RRSIGs with too few labels can lead to bypass of DNSSEC wildcard validation

CVE-2026-52688 is fixed in pdns-recursor on 1 platform, first by DEBIAN-CVE-2026-52688, released July 23, 2026. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2026-52688
- Priority: High
- CVSS: 7.5 (high)
- EPSS: 0.0018
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Jul 23, 2026

## Description

RRSIGs with too few labels can lead to bypass of DNSSEC wildcard validation

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | pdns-recursor Debian 13.5 (trixie) | 5.2.12-0+deb13u1 | [DEBIAN-CVE-2026-52688](https://patchblox.com/security/data/fix/linux/debian-cve-2026-52688.md) | Jul 23, 2026 |
| Linux | pdns-recursor Debian 14 | 5.4.4-1 | [DEBIAN-CVE-2026-52688](https://patchblox.com/security/data/fix/linux/debian-cve-2026-52688.md) | Jul 23, 2026 |

---

Data as of 2026-11-07T12:40:37Z 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 Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

Product names, logos and trademarks shown on Patch Radar belong to their respective owners. They are used only to identify the software each security fix applies to and to help readers find their platform. Their use does not imply any affiliation with, or endorsement by, those owners, and Patchblox is not affiliated with any of them.