What’s Vulnerable › Vulnerabilities
CVE-2026-33610: Possible file descriptor exhaustion in forward-dnsupdate
- Severity: high (CVSS 7.5 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.4% 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-400
Description
A rogue primary server may cause file descriptor exhaustion and eventually a denial of service, when a PowerDNS secondary server forwards a DNS update request to it.
Affected products
- PowerDNS Authoritative: from 4.9.0 before 4.9.14; from 5.0.0 before 5.0.4 — fixed in 4.9.14, 5.0.4
How to fix
Upgrade to a fixed version: PowerDNS Authoritative 4.9.14, 5.0.4. Check the vendor advisory for mitigations.
References
Get alerted when CVE-2026-33610 or the next vulnerability affects your stack