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.

CVSS Scores

EPSS Scores

Probability:
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Meta Information

Published

2026-04-22

Last Modified

2026-04-24

Generated

2026-07-06

AI Q&A

2026-04-22

EPSS Evaluated

2026-07-05

NVD

CVE-2026-33608

EUVD

EUVD-2026-24945

Affected Vendors & Products

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

KEV

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.

Attack-Flow Graph

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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