Auth bypass in 1panel-Dev Maxkb
CVE-2026-77525
MaxKB is an open-source AI assistant for enterprise. In 2.10.2-lts and earlier, management chat-record routes authorize the path application_id but load records using global chat_id and chat_record_id values without confirming that the chat belongs to the authorized application. A normal user in the same workspace who knows the chat_id of a persisted non-debug record for a victim's published application can place it under a separate attacker-owned application path to read victim chat records. An attacker with an owned knowledge base and document can also use add_knowledge to copy victim answers while updating the victim record's improve_paragraph_id_list. No fixed version is available as of this review.
Vulnerability class: Broken Access Control
Published · last modified .
CVSS v3 metric
CVSS v3 base score 4.2 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N.
EPSS exploit prediction
EPSS: 0.002 (9.3th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 9th percentile — 9.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: 0.000
Affected products
- 1panel-Dev Maxkb — versions <= 2.10.2-lts
Weakness classification (CWE)
References
Frequently asked questions
- What is CVE-2026-77525?
- CVE-2026-77525 is a medium-severity vulnerability in 1panel-Dev Maxkb, classified under Missing Authorization. CVSS score: 4.2/10. Published 2026-09-21.
- How severe is CVE-2026-77525?
- Medium severity. CVSS v3 base score is 4.2 out of 10.