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CVE-2026-39422

MEDIUM

5.4

Description

MaxKB is an open-source AI assistant for enterprise. Versions 2.7.1 and below contain a Stored Cross-Site Scripting (XSS) vulnerability through the application name or icon fields when creating an application. When a victim visits the public chat interface (/ui/chat/{access_token}), the ChatHeadersMiddleware retrieves the application data and directly inserts the unescaped application name and icon into the HTML response via string replacement. This allows an attacker to execute arbitrary JavaScript in the victim's browser context. This issue has been fixed in version 2.8.0.

CVE Details

CVSS v3.1 Score5.4

SeverityMEDIUM

CVSS VectorCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

Attack VectorNETWORK

ComplexityLOW

Privileges RequiredLOW

User InteractionREQUIRED

Published4/14/2026

Last Modified4/20/2026

Sourcenvd

Honeypot Sightings0

Affected Products

maxkb:maxkb

Weaknesses (CWE)

CWE-79

References

https://github.com/1Panel-dev/MaxKB/commit/026a2d623e2aa5efa67c4834651e79d5d7cab1da(security-advisories@github.com)

https://github.com/1Panel-dev/MaxKB/releases/tag/v2.8.0(security-advisories@github.com)

https://github.com/1Panel-dev/MaxKB/security/advisories/GHSA-wf7p-3jq5-q52w(security-advisories@github.com)

https://github.com/1Panel-dev/MaxKB/security/advisories/GHSA-wf7p-3jq5-q52w(134c704f-9b21-4f2e-91b3-4a467353bcc0)

IOC Correlations

No correlations recorded

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