CVE-2026-42337

MaxKB: Broken Access Control in MaxKB OSS URL Fetch API

State: Published
Severity: 5.3 Medium
Published: May 26, 2026
Updated: May 27, 2026
Reserved: Apr 26, 2026

Description

MaxKB is an open-source AI assistant for enterprise. MaxKB 2.8.0 and prior are vulnerable to a broken access control vulnerability in the OSS file service URL fetch API (chat/api/oss/get_url). The endpoint uses application_id from the URL path without validating ownership, allowing attackers to perform operations under other applications’ policies. This vulnerability is fixed in 2.8.1.

Scores

CVSS	Score	Vector	Source
4.0	5.3 Medium	CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N	GitHub_M

Weaknesses

CWE-862 Missing Authorization

Affected Products

Product	Versions
MaxKB1Panel-dev	< 2.8.1Affected

References

https://github.com/1Panel-dev/MaxKB/security/advisories/GHSA-2jmj-gwvg-3gp2

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