What is CVE-2026-39418?

CVE-2026-39418 is a medium-severity vulnerability in 1panel-dev Maxkb, classified under Server-Side Request Forgery (SSRF). CVSS score: 5.0/10. Published 2026-04-14.

How severe is CVE-2026-39418?

Medium severity. CVSS v3 base score is 5.0 out of 10.

SSRF in 1panel-dev Maxkb

CVE-2026-39418

MaxKB is an open-source AI assistant for enterprise. In versions 2.7.1 and below, sandbox network protection can be bypassed by using socket.sendto() with the MSG_FASTOPEN flag. This allows authenticated user with tool-editing permissions…

Vulnerability class: SSRF (Server-Side Request Forgery)

EPSS: 0.000 (11.5th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.0 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:L.

Affected products

1panel-dev Maxkb — versions < 2.8.0

Weakness classification (CWE)

CWE-918 — Server-Side Request Forgery (SSRF)

References

https://github.com/1Panel-dev/MaxKB/security/advisories/GHSA-w9g4-q3gm-6q6w (x_refsource_CONFIRM)
https://github.com/1Panel-dev/MaxKB/commit/4d06362750b15390437f1d2e4d14ec79baef8559 (x_refsource_MISC)
https://github.com/1Panel-dev/MaxKB/releases/tag/v2.8.0 (x_refsource_MISC)

Frequently asked questions

What is CVE-2026-39418?: CVE-2026-39418 is a medium-severity vulnerability in 1panel-dev Maxkb, classified under Server-Side Request Forgery (SSRF). CVSS score: 5.0/10. Published 2026-04-14.
How severe is CVE-2026-39418?: Medium severity. CVSS v3 base score is 5.0 out of 10.