CVE-2026-33610 PUBLISHED

Possible file descriptor exhaustion in forward-dnsupdate

Assigner: OX
Reserved: 23.03.2026 Published: 22.04.2026 Updated: 22.04.2026

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.

Metrics

CVSS 3.1

CVSS Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS Score: 5.9

Attack Vector	Network	Scope	Unchanged
Attack Complexity	High	Confidentiality Impact	None
Privileges Required	None	Integrity Impact	None
User Interaction	None	Availability Impact	High

CVSS 3.1

Product Status

Vendor	PowerDNS
Product	Authoritative
Versions	Default: unaffected affected from 5.0.0 to 5.0.4 (excl.) affected from 4.9.0 to 4.9.14 (excl.)

Credits

ylwango613 finder

References

https://docs.powerdns.com/authoritative/security-advisories/powerdns-advisory-powerdns-2026-05.html

Problem Types

Uncontrolled Resource Consumption CWE