# CVE-2026-123602: rust-hickory-resolver: The Hickory DNS recursor in all versions of hickory-recursor and in hickory-resolver 0.26.0-beta.1 before 0.26.2 (rec...

CVE-2026-123602 is fixed in rust-hickory-resolver on 1 platform by DEBIAN-CVE-2026-123602 (version 0.26.3-1), released November 9, 2026. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2026-123602
- Priority: Routine
- CVSS: n/a
- EPSS: 0.0027
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Nov 8, 2026

## Description

The Hickory DNS recursor in all versions of hickory-recursor and in hickory-resolver 0.26.0-beta.1 before 0.26.2 (recursor feature) is vulnerable to ghost domain names attacks because it reuses child-side apex NS RRsets cached from zone NS queries for iterative resolution. By repeatedly querying a zone's NS records, an attacker keeps the stale RRset cached indefinitely, letting name servers whose delegation the parent revoked keep answering for the zone.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | rust-hickory-resolver Debian 14 | 0.26.3-1 | [DEBIAN-CVE-2026-123602](https://patchblox.com/security/data/fix/linux/debian-cve-2026-123602.md) | Nov 9, 2026 |

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Data as of 2026-11-11T01:20:23Z 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 Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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