TI-2026-30641 Aliases CVE-2026-42337

MaxKB: Broken Access Control in MaxKB OSS URL Fetch API

LOW 23CWE-862Published 2026-05-26 · Updated 2026-05-27

Key facts

Attack vector: Network
Privileges required: Low
User interaction: None
Attack complexity: Low
Attack requirements: None
Impact type: Security bypass
Confidentiality · integrity · availability: Low · None · None
Fix status: Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-862.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00207 10th percentileScored 2026-11-07

Fix Fixed MaxKB (1Panel-dev): 2.8.1

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: No
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
1Panel-dev	MaxKB	before 2.8.1	2.8.1	Patch available	CNA

MaxKB Vendor1Panel-dev Affected before 2.8.1 Fixed in 2.8.1 Patch available CNA

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPE	Versions	Role	Vendor
cpe:2.3:a:maxkb:maxkb::::::::	—	—	Maxkb

cpe:2.3:a:maxkb:maxkb:*:*:*:*:*:*:*:* Versions — — ·Maxkb

Remediation

Fix · CNA MaxKB (1Panel-dev) Fixed in 2.8.1

Timeline

2026-10-02 Threatist record created from CVE-2026-42337

References

Other 1

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

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Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences