CVE-2026-4399 identifies a high-severity prompt injection vulnerability within the 1millionbot Millie chatbot. This flaw allows an unauthenticated remote attacker to bypass chat restrictions by employing Boolean prompt injection techniques. Successful exploitation, rated 8.7 HIGH on the CVSS scale, enables the chatbot to return prohibited information, abuse the service, or execute unintended tasks using 1millionbot's resources or OpenAI's API key. Currently, there is no evidence of active exploitation, public exploit code, or significant community discussion regarding this vulnerability.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
< 3.6.0CPE matchmatch criteria | cpe:2.3:a:1millionbot:millie_chatbot:*:*:*:*:*:*:*:* |
CVSS version used by this source: 4.0
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.
No media coverage found for this CVE.
The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.
Remediation records are not available for this CVE.