CVE-2026-42335: CWE-918: Server-Side Request Forgery (SSRF) in 1Panel-dev MaxKB
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.
AI Analysis
Technical Summary
CVE-2026-42335 is a server-side request forgery (SSRF) vulnerability affecting MaxKB, an open-source AI assistant for enterprise use. The vulnerability exists in versions prior to 2.8.1 in the OSS file service URL fetch endpoint (chat/api/oss/get_url). It arises from inconsistent URL parsing between the urlparse validation function and the requests HTTP client, which attackers can exploit to bypass validation and access internal network services. The vulnerability is fixed in MaxKB version 2.8.1.
Potential Impact
An attacker with limited privileges can exploit this SSRF vulnerability to make the server perform unauthorized requests to internal network services. This could lead to unauthorized information disclosure or interaction with internal systems that are otherwise inaccessible. There are no known exploits in the wild as of the published date.
Mitigation Recommendations
Upgrade MaxKB to version 2.8.1 or later, where this SSRF vulnerability is fixed. Since no official remediation level or patch links are provided, users should verify the update from the vendor's official source. Patch status is not explicitly confirmed beyond the version fix note; check the vendor advisory for current remediation guidance.
CVE-2026-42335: CWE-918: Server-Side Request Forgery (SSRF) in 1Panel-dev MaxKB
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.
CVSS v4.0
Score 6.3medium
Affected software
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Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-42335 is a server-side request forgery (SSRF) vulnerability affecting MaxKB, an open-source AI assistant for enterprise use. The vulnerability exists in versions prior to 2.8.1 in the OSS file service URL fetch endpoint (chat/api/oss/get_url). It arises from inconsistent URL parsing between the urlparse validation function and the requests HTTP client, which attackers can exploit to bypass validation and access internal network services. The vulnerability is fixed in MaxKB version 2.8.1.
Potential Impact
An attacker with limited privileges can exploit this SSRF vulnerability to make the server perform unauthorized requests to internal network services. This could lead to unauthorized information disclosure or interaction with internal systems that are otherwise inaccessible. There are no known exploits in the wild as of the published date.
Mitigation Recommendations
Upgrade MaxKB to version 2.8.1 or later, where this SSRF vulnerability is fixed. Since no official remediation level or patch links are provided, users should verify the update from the vendor's official source. Patch status is not explicitly confirmed beyond the version fix note; check the vendor advisory for current remediation guidance.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-04-26T13:26:14.514Z
- Cvss Version
- 4.0
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a16041ae29bf47b505e9f25
Added to database: 05/26/2026, 20:35:38 UTC
Last enriched: 06/02/2026, 21:08:47 UTC
Last updated: 07/31/2026, 19:22:58 UTC
Views: 55
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