CVE-2026-40208
Deferred Deferred - Pending Action
DoH3 GET Query Processing Delay via Invalid DATA Frame

Publication date: 2026-06-25

Last updated on: 2026-06-25

Assigner: Open-Xchange

Description
An attacker might be able to delay the processing of DoH3 queries by sending DoH3 GET queries with an invalid DATA frame.
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Meta Information
Published
2026-06-25
Last Modified
2026-06-25
Generated
2026-06-25
AI Q&A
2026-06-25
EPSS Evaluated
N/A
NVD
CVE-2026-40208
EUVD
EUVD-2026-39347
Affected Vendors & Products
Currently, no data is known.
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Exploitability
CWE
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KEV
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CWE ID Description
CWE-705 The product does not properly return control flow to the proper location after it has completed a task or detected an unusual condition.
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Executive Summary

This vulnerability involves an attacker potentially delaying the processing of DNS over HTTPS version 3 (DoH3) queries by sending DoH3 GET queries that contain an invalid DATA frame.

Impact Analysis

The impact of this vulnerability is a potential delay in the processing of DoH3 queries, which could lead to reduced availability or slower response times for DNS resolution over HTTPS.

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