CVE-2026-33594
Outgoing DoH excessive memory allocation
CVSS Score
5.3
EPSS Score
0.0%
EPSS Percentile
0th
A client can trigger excessive memory allocation by generating a lot of queries that are routed to an overloaded DoH backend, causing queries to accumulate into a buffer that will not be released until the end of the connection.
| Vendor | powerdns |
| Product | dnsdist |
| Published | Apr 22, 2026 |
| Last Updated | Apr 22, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
Low
Affected Versions
PowerDNS / DNSdist
1.9.0 < 1.9.13 2.0.0 < 2.0.4
References
Credits
Mehtab Zafar