What is CVE-2026-39423?

CVE-2026-39423 is a medium-severity vulnerability in 1panel-dev Maxkb, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2026-04-14.

How severe is CVE-2026-39423?

Medium severity. CVSS v3 base score is 5.4 out of 10.

RCE in 1panel-dev Maxkb

CVE-2026-39423

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 arbitr…

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.002 (6.9th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N.

Affected products

1panel-dev Maxkb — versions < 2.8.0
Maxkb

Weakness classification (CWE)

References

security-advisories@github.com (x_refsource_CONFIRM, Vendor Advisory)
security-advisories@github.com (Patch, x_refsource_MISC)
security-advisories@github.com (x_refsource_MISC, Release Notes)

Frequently asked questions

What is CVE-2026-39423?: CVE-2026-39423 is a medium-severity vulnerability in 1panel-dev Maxkb, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2026-04-14.
How severe is CVE-2026-39423?: Medium severity. CVSS v3 base score is 5.4 out of 10.