CVE-2026-33254
Resource exhaustion via DoQ/DoH3 connections
- State
- Published
- Severity
- 5.3 Medium
- Published
- Apr 22, 2026
- Updated
- Apr 22, 2026
- Reserved
- Mar 18, 2026
Description
An attacker can create a large number of concurrent DoQ or DoH3 connections, causing unlimited memory allocation in DNSdist and leading to a denial of service. DOQ and DoH3 are disabled by default.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 5.3 Medium | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L | OX |
Weaknesses
- CWE-770 Allocation of Resources Without Limits or Throttling
Affected Products
| Product | Versions |
|---|---|
DNSdistPowerDNS |
|
References
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