A high-severity vulnerability (CVE-2025-30194) in PowerDNS DNSdist, a widely used DNS load balancer and security tool, enables remote attackers to trigger denial-of-service (DoS) conditions by exploiting flaws in its DNS-over-HTTPS (DoH) implementation. The vulnerability, disclosed in PowerDNS Security Advisory, affects DNSdist versions 1.9.0 through 1.9.8 when configured to use the nghttp2 library for DoH processing.
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