CVE-2026-33608
Received Received - Intake
Configuration Injection in Bind Backend Causes Service Downtime

Publication date: 2026-04-22

Last updated on: 2026-04-24

Assigner: Open-Xchange

Description
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.
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Meta Information
Published
2026-04-22
Last Modified
2026-04-24
Generated
2026-06-16
AI Q&A
2026-04-22
EPSS Evaluated
2026-06-15
NVD
CVE-2026-33608
EUVD
EUVD-2026-24945
Affected Vendors & Products
Showing 2 associated CPEs
Vendor Product Version / Range
powerdns authoritative From 4.9.0 (inc) to 4.9.14 (exc)
powerdns authoritative From 5.0.0 (inc) to 5.0.4 (exc)
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-94 The product constructs all or part of a code segment using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the syntax or behavior of the intended code segment.
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Executive Summary

This vulnerability allows an attacker to send a notify request that adds a new secondary domain to the bind backend.

However, this action causes the backend to update its configuration to an invalid state.

As a result, the backend will fail to run on the next restart and will require manual intervention to fix the configuration.

Impact Analysis

The impact of this vulnerability is that the bind backend service will become non-functional after a restart due to an invalid configuration.

This disruption requires manual operation to restore service, potentially causing downtime and operational overhead.

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