EUVD-2026-19946

| CVE-2026-34371 MEDIUM
2026-04-07 GitHub_M
6.3
CVSS 3.1
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CVSS Vector

CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:N/I:H/A:N
Attack Vector
Network
Attack Complexity
High
Privileges Required
Low
User Interaction
None
Scope
Changed
Confidentiality
None
Integrity
High
Availability
None

Lifecycle Timeline

3
EUVD ID Assigned
Apr 07, 2026 - 21:31 euvd
EUVD-2026-19946
Analysis Generated
Apr 07, 2026 - 21:31 vuln.today
CVE Published
Apr 07, 2026 - 21:08 nvd
MEDIUM 6.3

Tags

Path Traversal

Description

LibreChat is a ChatGPT clone with additional features. Prior to 0.8.4, LibreChat trusts the name field returned by the execute_code sandbox when persisting code-generated artifacts. On deployments using the default local file strategy, a malicious artifact filename containing traversal sequences (for example, ../../../../../app/client/dist/poc.txt) is concatenated into the server-side destination path and written with fs.writeFileSync() without sanitization. This gives any user who can trigger execute_code an arbitrary file write primitive as the LibreChat server user. This vulnerability is fixed in 0.8.4.

Analysis

Arbitrary file write in LibreChat prior to 0.8.4 allows authenticated users to overwrite arbitrary server files via path traversal in code artifact filenames. The vulnerability affects LibreChat deployments using the default local file storage strategy, where the execute_code sandbox returns a user-controllable filename that is concatenated directly into the file write path without sanitization. …

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Priority Score

32
Low Medium High Critical
KEV: 0
EPSS: +0.0
CVSS: +32
POC: 0

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EUVD-2026-19946 vulnerability details – vuln.today
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