CVE-2026-34515
Received Received - Intake
Information Disclosure in AIOHTTP Static Resource Handler on Windows

Publication date: 2026-04-01

Last updated on: 2026-04-15

Assigner: GitHub, Inc.

Description
AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. Prior to version 3.13.4, on Windows the static resource handler may expose information about a NTLMv2 remote path. This issue has been patched in version 3.13.4.
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Meta Information
Published
2026-04-01
Last Modified
2026-04-15
Generated
2026-06-16
AI Q&A
2026-04-02
EPSS Evaluated
2026-06-15
NVD
CVE-2026-34515
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
aiohttp aiohttp to 3.13.4 (exc)
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-918 The web server receives a URL or similar request from an upstream component and retrieves the contents of this URL, but it does not sufficiently ensure that the request is being sent to the expected destination.
CWE-36 The product uses external input to construct a pathname that should be within a restricted directory, but it does not properly neutralize absolute path sequences such as "/abs/path" that can resolve to a location that is outside of that directory.
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Executive Summary

This vulnerability exists in AIOHTTP, an asynchronous HTTP client/server framework for asyncio and Python. Prior to version 3.13.4, on Windows systems, the static resource handler could expose information about a NTLMv2 remote path. This exposure could potentially leak sensitive information related to network authentication paths.

Impact Analysis

The vulnerability may lead to unintended disclosure of NTLMv2 remote path information on Windows systems using affected versions of AIOHTTP. This information exposure could be leveraged by attackers to gain insights into network authentication details, potentially aiding in further attacks or reconnaissance.

Mitigation Strategies

To mitigate this vulnerability, you should upgrade AIOHTTP to version 3.13.4 or later, as this version contains the patch that fixes the issue with the static resource handler exposing NTLMv2 remote path information on Windows.

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