Auth bypass in 1panel-Dev Maxkb
CVE-2026-79917
MaxKB is an open-source AI assistant for enterprise. In 2.7.0 through 2.10.4-lts, POST /chat/api/{application_id}/chat/{chat_id}/share_chat verifies that a conversation exists but does not verify that it belongs to the authenticated chat_user_id or to the application bound to the caller's token. An attacker with any chat token and a known victim chat_id can create an unauthenticated public ChatShareLink exposing the victim's conversation and can create PublicFileAccess state that makes associated files retrievable without credentials, with no available revoke path. No fixed version is available as of this review.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:N.
EPSS exploit prediction
EPSS: 0.003 (19.0th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 19th percentile — 19.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: 0.000
Affected products
- 1panel-Dev Maxkb — versions >= 2.7.0, <= 2.10.4-lts
Weakness classification (CWE)
References
Frequently asked questions
- What is CVE-2026-79917?
- CVE-2026-79917 is a medium-severity vulnerability in 1panel-Dev Maxkb, classified under Improper Authorization. CVSS score: 6.5/10. Published 2026-09-21.
- How severe is CVE-2026-79917?
- Medium severity. CVSS v3 base score is 6.5 out of 10.