CVE-2026-39423CWE-79CWE-95

Stored XSS via Eval Injection in EchartsRander Component

Medium · published April 14, 2026

CVSS v4.0
6.9
EPSS
0%
Percentile
21.0
In the wild
Unconfirmed
What it is

MaxKB is an open-source AI assistant for enterprise. Versions 2.7.1 and below contain an Eval Injection vulnerability in the Markdown rendering engine that allows any user capable of interacting with the AI chat interface to execute arbitrary JavaScript in the browsers of other users, including administrators, resulting in Stored Cross-Site Scripting (XSS). This issue has been fixed in version 2.8.0.

The record
Technical detail
CVSS v4.0
6.9 · MEDIUM
Vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N
EPSS
0.00295 · 21.0th percentile
Weaknesses
CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting'); CWE-95 · Improper Neutralization of Directives in Dynamically Evaluated Code ('Eval Injection')
Published
2026-04-14T00:28Z
EPSS history
Timeline
  • 14 APR 00:28Z
    Stored XSS via Eval Injection in EchartsRander Component
    cvelistv5