CVE-2026-33596
TCP backend stream ID overflow
Vexday Risk Score
8Low
SSVC decision (CISA)
Track
No exploitation signal → monitor
CVSS 3.1EPSS 0.2%KEV nãoPoC —Patch —
Lifecycle
22 Apr 2026Published on NVD
Recommendation: Monitor — no exploitation signal at the moment.
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.
CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L
Affected products
PowerDNS · DNSdistWant to know if your infrastructure is exposed to this?
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