CVE-2026-54027: medium-severity vulnerability in danny-avila LibreChat
LibreChat: Image Upload Route Bypasses Agent Permission Check — Incomplete Fix for File Upload Authorization
Published · Updated
E-mail alert when it lands in KEV, gets a public PoC or its score goes up.
13Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 6.5epss 0.3%
LibreChat is an enhanced ChatGPT clone that supports multiple AI providers. Prior to 0.8.4-rc1, the POST /api/files/images endpoint allows any authenticated user to upload files into any agent's tool_resources (e.g., context, execute_code) without verifying ownership or EDIT permission on the target agent. A permission check was added to the POST /api/files route in a previous patch, but the image upload route was never updated with the same check. An attacker can simply use the image endpoint instead of the file endpoint to bypass the authorization entirely. This vulnerability is fixed in 0.8.4-rc1.
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
Affected products
danny-avila · LibreChatRelated CVEs — danny-avila LibreChat
In the same product, most dangerous first.
CVE-2025-69222CRITICALLibreChat is vulnerable to Server-Side Request Forgery due to missing restrictionsEPSS 4.6%CVE-2026-22252CRITICALLibreChat MCP Stdio Remote Command ExecutionEPSS 4.2%CVE-2026-32625CRITICALLibreChat Exfiltrates Server Secrets via MCP Server URL InjectionEPSS 2.8%CVE-2025-54868HIGHLibreChat exposes arbitrary chats through Meilisearch engineEPSS 0.5%CVE-2026-54037MEDIUMLibreChat: Incomplete Fix for CVE-2025-7105 — /api/convos/duplicate Lacks Rate Limiting Applied to /api/convos/forkEPSS 0.5%CVE-2026-54024MEDIUMLibreChat: Incomplete Fix for CVE-2024-11171 — Conversation Import Multer Instance Missing File Size LimitsEPSS 0.4%