๐Ÿ›ก๏ธ CVE-2026-4399
๐ŸŸ  CVSS 7.5 โ€” High โœ… No Known Exploit CWE-77 NVD
7.5
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

Prompt injection vulnerability in 1millionbot Millie chatbot that occurs when a user manages to evade chat restrictions using Boolean prompt injection techniques (formulating a question in such a way that, upon receiving an affirmative response ('true'), the model executes the injected instruction), causing it to return prohibited information and information outside its intended context. Successful exploitation of this vulnerability could allow a malicious remote attacker to abuse the service for purposes other than those originally intended, or even execute out-of-context tasks using 1millionbot's resources and/or OpenAI's API key. This allows the attacker to evade the containment mechanisms implemented during LLM model training and obtain responses or chat behaviors that were originally restricted.

Details

Severity HIGH
CVSS Score 7.5
CVSS Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
CWE CWE-77
Public Exploit โœ… No
Source NVD
Published 2026-03-31
Updated 2026-06-02
Modified 2026-04-13
Fix URL N/A

Affected Packages

Software From version Fixed in
millie-chatbot โ€” 3.6.0

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