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CVE-2026-54027

MEDIUM
6.5
CVSS 3.1
Description
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.

Metadata

CVE ID
CVE-2026-54027
State
PUBLISHED
Assigner
GitHub_M
Reserved
2026-06-11 16:57 UTC
Published
2026-06-25 15:52 UTC
Last updated
2026-06-25 15:52 UTC
Primary CWE
CWE-862
CWE-862: Missing Authorization
Vendor / Product
danny-avila / LibreChat
Sources
cve.org  ·  NVD

Severity & Metrics

6.5 MEDIUM CVSS 3.1
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
Affected products (1)
VendorProductPlatformVersions
danny-avila LibreChat — < 0.8.4-rc1
Weakness (CWE)
CWESourceDescription
CWE-862 cna CWE-862: Missing Authorization
CVSS scores (1)
ScoreSeverityVersionSourceVector
6.5 MEDIUM 3.1 cna CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
References (1)
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