What’s Vulnerable › Vulnerabilities

CVE-2026-33597: PRSD detection denial of service

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-04-22 · updated 2026-10-26
• Weakness: CWE-116

Description

PRSD detection denial of service

Affected products

• PowerDNS DNSdist: from 1.9.0 before 1.9.13; from 2.0.0 before 2.0.4 — fixed in 1.9.13, 2.0.4

How to fix

Upgrade to a fixed version: PowerDNS DNSdist 1.9.13, 2.0.4. Check the vendor advisory for mitigations.

References

• https://www.dnsdist.org/security-advisories/powerdns-advisory-for-dnsdist-2026-04.html

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