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CVE-2026-34371

LibreChat Affected by Arbitrary File Write via `execute_code` Artifact Filename Traversal

Published: Apr 7, 2026Updated: Apr 14, 2026 Sources: CVE List NVDCWE-22
NVD MITRE
6.3CVSSMEDIUM
EPSS Score
0.3%
Top 83.1%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

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.

CVSS Vector Breakdown

AV:NAC:HPR:LUI:NS:CC:NI:HA:N
Exploitability
AV:NAttack Vector
Network
AC:HAttack Complexity
High
PR:LPrivileges Required
Low
UI:NUser Interaction
None
Scope
S:CScope
Changed
Impact
C:NConfidentiality
None
I:HIntegrity
High
A:NAvailability
None
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Weaknesses

CWE-22

Affected Products

librechatlibrechat
Mixed
Communications / messaging-chat
LibreChatdanny-avila
Mixed
Communications / messaging-chat
librechatoss-projectCommunications
danny-avilaindividual-devCommunicationsaka danny-avila/librechat, librechat

Attack Graph

Products CVE Techniques Tactics

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Exploitability

Official Patch Available

MITRE ATT&CK

2 techniques
Collection
Discovery
View detailed technique mapping

References

https://github.com/danny-avila/LibreChat/security/advisories/GHSA-qrm5-r67f-6692
github.com

Timeline

Published
Apr 7, 2026
Last Updated
Apr 14, 2026

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