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TI-2026-83265 Aliases CVE-2026-119979GHSA-fv7x-c662-7ccq

Path traversal in LM Studio model downloader lets attackers write files

Priority MEDIUM 46CWE-22Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
Passive
Attack complexity
Low
Attack requirements
None
Impact type
—
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA.

Summary

LM Studio before 0.4.22+1 contains a path traversal flaw (CWE-22) in the model downloader's resolveDownloadRequest, which accepts backslash-separated filenames that escape the models directory. An attacker can write files outside that directory by tricking a user into downloading a crafted model repository that plants a plugin manifest and configuration files. The planted Python payload then runs on every launch of the application, and user interaction is required.

Written with Claude Haiku 5.5 from the sources below · 2026-10-31

Description from the CNA

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00397 34th percentileScored 2026-11-07
Fix Fixed LM Studio (Element Labs): 0.4.22+1

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
Element LabsLM Studiobefore 0.4.22+10.4.22+1Patch availableCNA
  • LM Studio VendorElement Labs Affected before 0.4.22+1 Fixed in 0.4.22+1 Patch available CNA

Remediation

Update LM Studio to version 0.4.22+1 or later, which fixes the flaw.

Written with Claude Haiku 5.5 from the sources below · 2026-10-31

  • Fix · CNA LM Studio (Element Labs) Fixed in 0.4.22+1

Timeline

  1. 2026-10-30 Threatist record created from CVE-2026-119979
  2. 2026-10-30 CISA SSVC decision points changed
  3. 2026-10-30 Alias added: GHSA-fv7x-c662-7ccq

References

Other 1

Sources

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