CVE-2026-33596
TCP backend stream ID overflow
CVSS Score
3.1
EPSS Score
0.0%
EPSS Percentile
0th
A client might theoretically be able to cause a mismatch between queries sent to a backend and the received responses by sending a flood of perfectly timed queries that are routed to a TCP-only or DNS over TLS backend.
| Vendor | powerdns |
| Product | dnsdist |
| Published | Apr 22, 2026 |
| Last Updated | Apr 22, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L Attack Vector
Adjacent
Attack Complexity
High
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
ylwango613