LM Studio before 0.4.22+1 contains a path traversal vulnerability in the model downloader's resolveDownloadRequest that allows attackers to write files outside the models directory using backslash-separated traversal filenames. Attackers can trick users into downloading a crafted model repository that plants a plugin manifest.json, install-state.json and mcp-bridge-config.json, running an attacker-supplied Python payload on every launch.

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History

Fri, 30 Oct 2026 18:00:00 +0000

Type Values Removed Values Added
Description LM Studio before 0.4.22+1 contains a path traversal vulnerability in the model downloader's resolveDownloadRequest that allows attackers to write files outside the models directory using backslash-separated traversal filenames. Attackers can trick users into downloading a crafted model repository that plants a plugin manifest.json, install-state.json and mcp-bridge-config.json, running an attacker-supplied Python payload on every launch.
Title LM Studio before 0.4.22+1 Path Traversal via Model Downloader
Weaknesses CWE-22
References
Metrics cvssV3_1

{'score': 8.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H'}

cvssV4_0

{'score': 8.7, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N'}


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cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published:

Updated: 2026-10-30T18:34:20.363Z

Reserved: 2026-10-30T17:45:34.401Z

Link: CVE-2026-119979

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-10-30T18:17:27.760

Modified: 2026-10-30T18:17:27.760

Link: CVE-2026-119979

cve-icon Redhat

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cve-icon OpenCVE Enrichment

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Weaknesses