CVE-2026-42335
SSRF Bypass in MaxKB AI Assistant
Publication date: 2026-05-26
Last updated on: 2026-05-26
Assigner: GitHub, Inc.
Description
Description
CVSS Scores
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Meta Information
Affected Vendors & Products
Helpful Resources
Exploitability
| 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. |
Attack-Flow Graph
AI Powered Q&A
Can you explain this vulnerability to me?
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.
How can this vulnerability impact me? :
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.
What immediate steps should I take to mitigate this vulnerability?
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.