CVE-2026-33608 PUBLISHED

Incomplete domain name sanitization during

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

An attacker can send a notify request that causes a new secondary domain to be added to the bind backend, but causes said backend to update its configuration to an invalid one, leading to the backend no longer able to run on the next restart, requiring manual operation to fix it.

Metrics

CVSS 3.1

CVSS Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:H
CVSS Score: 7.4

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

Vitaly Simonovich finder

References

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

Problem Types

Improper Control of Generation of Code ('Code Injection') CWE