CVE-2026-6107: 1panel-Dev Maxkb

Low severity, CVSS 3.5. EPSS: 0.4% chance of exploitation in the next 30 days.

A flaw has been found in 1Panel-dev MaxKB up to 2.6.1. This issue affects some unknown processing of the file apps/common/middleware/chat_headers_middleware.py of the component ChatHeadersMiddleware. This manipulation of the argument Name causes cross site scripting. Remote exploitation of the attack is possible. Upgrading to version 2.8.0 is capable of addressing this issue. Patch name: 026a2d623e2aa5efa67c4834651e79d5d7cab1da. Upgrading the affected component is advised. The vendor was contacted early, responded in a very professional manner and quickly released a fixed version of the affected product.

Affected products

• 1panel-Dev Maxkb: version 2.6.0 only; version 2.6.1 only

Published 2026-04-12. Last modified 2026-06-17.