CVE-2026-4276 LibreChat RAG API, version 0.7.0, contains a log-injection vulnerability that allows attackers to forge log entries.
Attackers can forge log entries in LibreChat RAG API via log injection, compromising audit trails and potentially misleading security monitoring.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-4276?
CVE-2026-4276 is a high-severity code injection vulnerability in Librechat Librechat, published on 16 Mar 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
LibreChat RAG API, version 0.7.0, contains a log-injection vulnerability that allows attackers to forge log entries.
Weakness: CWE-94
Which versions are affected by CVE-2026-4276?
It affects 1 product.
Products include Librechat Librechat.
How do I fix CVE-2026-4276?
No fix has been published for CVE-2026-4276 yet. Limit exposure of the affected software until one is available.
Upgrade, and never evaluate templates, expressions or code built from user input. More about Code injection.
Is CVE-2026-4276 being exploited?
There is no known exploitation of CVE-2026-4276 in the wild and no public exploit code.
Other vulnerabilities in Librechat Librechat
- CVE-2026-32625 LibreChat Exfiltrates Server Secrets via MCP Server URL Injection
- CVE-2024-11167 Improper Access Control in danny-avila/librechat
- CVE-2026-22252 LibreChat MCP Stdio Remote Command Execution
- CVE-2025-69222 LibreChat is vulnerable to Server-Side Request Forgery due to missing restrictions
- CVE-2024-41704 Path traversal in n/a
Sources
Also known as GHSA-hx3h-9mjj-5pmg.