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.

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

Affected products

PowerDNS/Dnsdist2 versions
cpe:2.3:a:powerdns:dnsdist:*:*:*:*:*:*:*:*+ 1 more
- cpe:2.3:a:powerdns:dnsdist:*:*:*:*:*:*:*:*range: >=1.9.0,<1.9.13
- (no CPE)
osv-coords
pkg:rpm/opensuse/dnsdist&distro=openSUSE%20Tumbleweed
Range: < 2.0.5-1.1

Patches

Vulnerability mechanics

References

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

News mentions

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