# hickory-resolver (crates.io) vulnerabilities

3 known vulnerabilities (2 high, 1 medium), with the versions each affects and the releases that fix them.

## At a glance

- Latest release: 0.26.3 (Sep 10, 2026): no advisory affects it
- Newest unaffected release: 0.26.3 (Sep 10, 2026), the latest release
- Weekly downloads: 2.4M
- Dependents: 0
- Releases: 23 since 0.1.0 (Sep 26, 2023)
- Registry: https://crates.io/crates/hickory-resolver
- Releases read: Nov 8, 2026

## Version timeline

Affected versions per advisory, in version order:

- GHSA-6F2X-V7Q7-M7M5: 0.25.0 to 0.26.1 (0.26.2 is outside it)
- GHSA-6W6G-HM98-MHGM: 0.26.0-beta.1 to 0.26.1 (0.26.2 is outside it)
- CVE-2026-93657: 0.1.0 to 0.26.1 (0.26.2 is outside it)

## Advisories (3)

### [GHSA-6F2X-V7Q7-M7M5](https://cve.now/GHSA-6F2X-V7Q7-M7M5): hickory-resolver follows irrelevant CNAME records

- Severity: Medium
- Published: Oct 5, 2026
- Affected: from 0.25.0, fixed in 0.26.2.
- Fixed in 0.26.2 (released Sep 3, 2026, 32 days before disclosure).
- The latest release, 0.26.3, is not affected.

### [GHSA-6W6G-HM98-MHGM](https://cve.now/GHSA-6W6G-HM98-MHGM): hickory-resolver: Unbounded TC-retry loop in \`NameServerPool::try\_send\` (resource-exhaustion DoS)

- Severity: High
- Published: Oct 5, 2026
- Affected: from 0.26.0-beta.1, fixed in 0.26.2.
- Fixed in 0.26.2 (released Sep 3, 2026, 32 days before disclosure).
- The latest release, 0.26.3, is not affected.

### [CVE-2026-93657](https://cve.now/CVE-2026-93657): hickory-resolver before 0.26.2 DNSSEC Validation Bypass

- Severity: High 8.7
- Published: Sep 18, 2026
- Affected: fixed in 0.26.2; fixed in 0.26.2.
- Fixed in 0.26.2 (released Sep 3, 2026, 15 days before disclosure).
- The latest release, 0.26.3, is not affected.
- 81% of hickory-resolver downloads in the last 90 days were affected versions (25.8M).

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