Medium severity5.3NVD Advisory· Published Apr 22, 2026· Updated Apr 24, 2026

CVE-2026-33594

Description

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.

Affected products

PowerDNS/Dnsdist
cpe:2.3:a:powerdns:dnsdist:*:*:*:*:*:*:*:*
Range: >=1.9.0,<1.9.13

Patches

No patches discovered yet.

Vulnerability mechanics

AI mechanics synthesis has not run for this CVE yet.

References

www.dnsdist.org/security-advisories/powerdns-advisory-for-dnsdist-2026-04.htmlnvdVendor Advisory

News mentions

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cvss	0.345
epss	0.000
exploit	0.000
kev	0.000
patch	0.000
ransomware	0.000