CVE-2026-42335
Deferred Deferred - Pending Action
SSRF Bypass in MaxKB AI Assistant

Publication date: 2026-05-26

Last updated on: 2026-05-26

Assigner: GitHub, Inc.

Description
MaxKB is an open-source AI assistant for enterprise. Prior to 2.8.1, MaxKB v2.8.0 and prior are vulnerable to a server-side request forgery (SSRF) bypass in the OSS file service URL fetch (chat/api/oss/get_url) endpoint. The vulnerability exists due to inconsistent URL parsing between the urlparse validation function and the requests HTTP client, allowing attackers to access internal network services. This vulnerability is fixed in 2.8.1.
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Meta Information
Published
2026-05-26
Last Modified
2026-05-26
Generated
2026-06-16
AI Q&A
2026-05-27
EPSS Evaluated
2026-06-14
NVD
CVE-2026-42335
Affected Vendors & Products
Currently, no data is known.
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.
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Executive Summary

The vulnerability in MaxKB versions 2.8.0 and prior is a server-side request forgery (SSRF) bypass in the OSS file service URL fetch endpoint (chat/api/oss/get_url).

It occurs because of inconsistent URL parsing between the urlparse validation function and the requests HTTP client, which allows attackers to bypass security checks and access internal network services.

This issue was fixed in version 2.8.1.

Impact Analysis

This vulnerability can allow attackers to access internal network services that are normally protected from external access.

Such unauthorized access could lead to information disclosure, unauthorized actions within the internal network, or further exploitation of internal systems.

Mitigation Strategies

To mitigate this vulnerability, you should upgrade MaxKB to version 2.8.1 or later, as this version contains the fix for the server-side request forgery (SSRF) bypass issue.

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