CVE-2026-42337: CWE-862: Missing Authorization in 1Panel-dev MaxKB
MaxKB versions 2. 8. 0 and earlier contain a broken access control vulnerability in the OSS file service URL fetch API endpoint. The vulnerability arises because the endpoint uses the application_id from the URL path without verifying that the requester owns the application, allowing unauthorized operations under other applications' policies. This issue is fixed in version 2. 8. 1. The vulnerability has a medium severity with a CVSS score of 5. 3 and does not require user interaction or privileges beyond low-level access.
AI Analysis
Technical Summary
CVE-2026-42337 is a broken access control vulnerability (CWE-862) affecting MaxKB, an open-source AI assistant for enterprise. Versions prior to 2.8.1 have an insecure OSS file service URL fetch API (chat/api/oss/get_url) that fails to validate ownership of the application_id parameter in the URL path. This allows attackers with low privileges to perform operations under other applications' policies, potentially leading to unauthorized access or actions. The vulnerability is resolved in MaxKB version 2.8.1.
Potential Impact
Attackers with low privileges can exploit this vulnerability to perform unauthorized operations under other applications' policies by manipulating the application_id parameter. This could lead to unauthorized access or actions within the affected MaxKB environment. There are no known exploits in the wild at this time.
Mitigation Recommendations
Upgrade MaxKB to version 2.8.1 or later, where this broken access control vulnerability is fixed. Since the vendor has released a fixed version, applying this official update is the recommended remediation. Patch status is confirmed by the vendor's versioning information.
CVE-2026-42337: CWE-862: Missing Authorization in 1Panel-dev MaxKB
Description
MaxKB versions 2. 8. 0 and earlier contain a broken access control vulnerability in the OSS file service URL fetch API endpoint. The vulnerability arises because the endpoint uses the application_id from the URL path without verifying that the requester owns the application, allowing unauthorized operations under other applications' policies. This issue is fixed in version 2. 8. 1. The vulnerability has a medium severity with a CVSS score of 5. 3 and does not require user interaction or privileges beyond low-level access.
CVSS v4.0
Score 5.3medium
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-42337 is a broken access control vulnerability (CWE-862) affecting MaxKB, an open-source AI assistant for enterprise. Versions prior to 2.8.1 have an insecure OSS file service URL fetch API (chat/api/oss/get_url) that fails to validate ownership of the application_id parameter in the URL path. This allows attackers with low privileges to perform operations under other applications' policies, potentially leading to unauthorized access or actions. The vulnerability is resolved in MaxKB version 2.8.1.
Potential Impact
Attackers with low privileges can exploit this vulnerability to perform unauthorized operations under other applications' policies by manipulating the application_id parameter. This could lead to unauthorized access or actions within the affected MaxKB environment. There are no known exploits in the wild at this time.
Mitigation Recommendations
Upgrade MaxKB to version 2.8.1 or later, where this broken access control vulnerability is fixed. Since the vendor has released a fixed version, applying this official update is the recommended remediation. Patch status is confirmed by the vendor's versioning information.
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: 6a16041ae29bf47b505e9f2b
Added to database: 5/26/2026, 8:35:38 PM
Last enriched: 5/26/2026, 8:49:47 PM
Last updated: 5/27/2026, 5:02:09 AM
Views: 3
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