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 (chat/api/oss/get_url). The endpoint fails to validate ownership of the application_id parameter, allowing unauthorized operations under other applications' policies. This issue is addressed in MaxKB version 2.8.1. The vulnerability has a medium severity with a CVSS 4.0 base score of 5.3.
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 do not properly validate the ownership of the application_id parameter in the OSS file service URL fetch API endpoint (chat/api/oss/get_url). This allows an attacker with limited privileges to perform unauthorized operations under the context of other applications' policies. The vulnerability is fixed in version 2.8.1.
Potential Impact
Exploitation of this vulnerability could allow an attacker with limited privileges to bypass access controls and perform actions or retrieve data associated with other applications, potentially leading to unauthorized access or manipulation of resources. The CVSS 4.0 score of 5.3 indicates a medium impact level.
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. No additional mitigation guidance is provided or required beyond updating.
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 (chat/api/oss/get_url). The endpoint fails to validate ownership of the application_id parameter, allowing unauthorized operations under other applications' policies. This issue is addressed in MaxKB version 2.8.1. The vulnerability has a medium severity with a CVSS 4.0 base score of 5.3.
CVSS v4.0
Score 5.3medium
Affected software
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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 do not properly validate the ownership of the application_id parameter in the OSS file service URL fetch API endpoint (chat/api/oss/get_url). This allows an attacker with limited privileges to perform unauthorized operations under the context of other applications' policies. The vulnerability is fixed in version 2.8.1.
Potential Impact
Exploitation of this vulnerability could allow an attacker with limited privileges to bypass access controls and perform actions or retrieve data associated with other applications, potentially leading to unauthorized access or manipulation of resources. The CVSS 4.0 score of 5.3 indicates a medium impact level.
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. No additional mitigation guidance is provided or required beyond updating.
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: 05/26/2026, 20:35:38 UTC
Last enriched: 06/02/2026, 21:19:46 UTC
Last updated: 07/31/2026, 19:22:58 UTC
Views: 61
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