CVE-2026-42337

MaxKB: Broken Access Control in MaxKB OSS URL Fetch API

MEDIUM

5.3

CVSS Score

Published: May 26, 2026 at 08:19 PM UTC

Updated: July 23, 2026 at 07:32 PM UTC

1 product affected across 1 vendorMaxKB

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Severity

MEDIUM5.3

Exploit prediction

EPSS 0.2%

SSVC

No known exploit

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

MaxKB · 1PANEL Dev

60%

v < 2.8.1

Affected range stops below 2.8.1, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (1)

x_refsource_CONFIRM

Source: cverecord

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

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

5.3MEDIUMGitHub_M

Vector?

Quick Info

StatusDEFERRED

CWE

CWE-862

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