CVE-2026-6106: XSS in 1Panel-dev MaxKB

The XSS vulnerability in 1Panel-dev MaxKB allows an attacker to inject arbitrary JavaScript code into the application's web pages. This code can then be executed in the context of a user's browser, potentially enabling the attacker to steal session cookies, redirect users to malicious websites, or deface the application. Given the public nature of the exploit, the risk of immediate exploitation is elevated. The Public Chat Interface component is likely used for user interaction, making it a prime target for attackers seeking to compromise user accounts or gain access to sensitive information. The impact could extend beyond the immediate application, potentially affecting other systems accessible from the compromised user's session.

1. Reserved2026-04-11
2. Published2026-04-11
3. Modified2026-04-13
4. EPSS updated2026-04-19

The primary mitigation for CVE-2026-6106 is to upgrade 1Panel-dev MaxKB to version 2.8.0, which contains the fix (commit 026a2d623e2aa5efa67c4834651e79d5d7cab1da). If upgrading is not immediately feasible, consider implementing temporary workarounds such as input validation and output encoding on the 'Name' parameter within the StaticHeadersMiddleware function. Web application firewalls (WAFs) configured to detect and block XSS payloads can also provide a layer of protection. Monitor application logs for suspicious activity, particularly requests containing unusual characters or patterns in the 'Name' parameter. After upgrade, confirm the vulnerability is resolved by attempting to inject a simple XSS payload into the 'Name' field and verifying that it is properly sanitized.