CVE-2026-4276 Details

A log-injection vulnerability has been identified in the LibreChat RAG API version 0.7.0. This vulnerability arises from improper sanitization of user input before it is logged, allowing authenticated attackers to manipulate log entries by inserting carriage-return or line-feed characters. This could obscure malicious activities or mislead forensic investigations. Additionally, if the altered logs are processed by insecure log-management tools or viewed through a web-based administrative console, it could lead to further attacks, such as cross-site scripting or remote command execution.

No official patch is available for this vulnerability. However, it can be mitigated by sanitizing input logs to filter out malicious data, disabling the pgvector extension in PostgreSQL if not in use, and validating RAG output before using it with other tools to prevent indirect prompt injection. These strategies can be combined for enhanced protection.