CVE-2026-119979— LM Studio before 0.4.22+1 Path Traversal via Model Downloader

Quick assessment

Affected

Element Labs LM Studio

Exploitation

No confirmed in-the-wild exploitation; assess based on exposure

Recommended action

Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

LM Studio 在 0.4.22+1 之前的版本中，其模型下载器的函数存在路径遍历漏洞。攻击者可利用反斜杠分隔的遍历文件名，将文件写入模型目录之外。攻击者可以诱使用户下载精心构造的模型仓库，该仓库会植入、和文件，从而在每次启动时执行攻击者提供的 Python 恶意代码。

CVSS 8.8 · High Updated Oct 31, 2026

Possible ATT&CK Techniques 3 AI

T1059.006 · Python T1566.002 · Spearphishing Link T1587.001 · Malware

Affected Version Matrix 1

Vendor	Product	Version Range	Status
Element Labs	LM Studio	`< 0.4.22+1`	affected

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Vulnerability Information

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Vulnerability Title

LM Studio before 0.4.22+1 Path Traversal via Model Downloader

Source: CVE Program / CVE List V5

Vulnerability 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.

Source: CVE Program / CVE List V5

CVSS Information

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Source: CVE Program / CVE List V5

Vulnerability Type

对路径名的限制不恰当(路径遍历)

Source: CVE Program / CVE List V5

Affected Products

Vendor	Product	Affected Versions	CPE	Subscribe
Element Labs	LM Studio	0 ~ 0.4.22+1	-

II. Public POCs for CVE-2026-119979

#	POC Description	Source Link	Shenlong Link

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III. Intelligence Information for CVE-2026-119979

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Other References for CVE-2026-119979 (2)

https://lmstudio.ai/changelog/lmstudio-v0.4.22 release-notes
https://www.vulncheck.com/advisories/lm-studio-before-0.4.22-1-path-traversal-via-model-downloader third-party-advisory

https://www.cve.org/CVERecord?id=CVE-2026-119979

IV. Related Vulnerabilities

Same weakness: CWE-22