CVE-2026-4400

Multiple vulnerabilities in 1millionbot Millie chatbot

Published Mar 31, 2026 CVSS 4.0 · 7 High EPSS < 1% KEV · Not listed
Description
Insecure Direct Object Reference (IDOR) vulnerability in 1millionbot Millie chat that allows private conversations of other users being viewed by simply changing the conversation ID. The vulnerability is present in the endpoint 'api.1millionbot.com/api/public/conversations/' and, if exploited, could allow a remote attacker to access other users private chatbot conversations, revealing sensitive or confidential data without requiring credentials or impersonating users. In order for the vulnerability to be exploited, the attacker must have the user's conversation ID.

Remediation

Vendor Solution

The vulnerabilities have been fixed by 1millionbot team in version 3.6.0.

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
First Time appeared 1millionbot millie Chatbot
CPEs cpe:2.3:a:1millionbot:millie_chat_bot:*:*:*:*:*:*:*:* cpe:2.3:a:1millionbot:millie_chatbot:*:*:*:*:*:*:*:*
Vendors & Products 1millionbot millie Chat Bot
1millionbot millie Chatbot
Type Values Removed Values Added
First Time appeared 1millionbot millie Chat Bot
CPEs cpe:2.3:a:1millionbot:millie_chat_bot:*:*:*:*:*:*:*:*
Vendors & Products 1millionbot millie Chat Bot
Metrics cvssV3_1

{'score': 6.5, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:N'}

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
Description Insecure Direct Object Reference (IDOR) vulnerability in 1millionbot Millie chat that allows private conversations of other users being viewed by simply changing the conversation ID. The vulnerability is present in the endpoint 'api.1millionbot.com/api/public/conversations/' and, if exploited, could allow a remote attacker to access other users private chatbot conversations, revealing sensitive or confidential data without requiring credentials or impersonating users. In order for the vulnerability to be exploited, the attacker must have the user's conversation ID.
Title Multiple vulnerabilities in 1millionbot Millie chatbot
First Time appeared 1millionbot
1millionbot millie Chat
Weaknesses CWE-639
CPEs cpe:2.3:a:1millionbot:millie_chat:3.6.0:*:*:*:*:*:*:*
Vendors & Products 1millionbot
1millionbot millie Chat
References
Metrics cvssV4_0

{'score': 7, 'vector': 'CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:H/SI:H/SA:N'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
INCIBE
Published
Updated
Mar 31, 2026, 1:30 PM
Reserved
Mar 18, 2026, 5:18 PM
Status
Analyzed
Published
Mar 31, 2026, 11:16 AM
Modified
Jun 17, 2026, 10:56 AM