CVE-2026-44691

Remote Code Execution via Untrusted Workspace Task Definitions

Published Jun 18, 2026 CVSS 4.0 · 8.4 High EPSS < 1% KEV · Not listed
Description
In Eclipse Theia versions prior to 1.69.0, custom task definitions in workspace files (e.g. .theia/tasks.json, .vscode/tasks.json) could be executed without requiring workspace trust. An attacker could craft a malicious repository that, when cloned and opened in Theia, leads to execution of arbitrary commands with the user's privileges. In combination with AI chat features and a workspace .theia/settings.json that disabled tool confirmation, this could be triggered automatically by sending a message in the AI chat.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
Github GHSA Github GHSA GHSA-g9jw-92q7-g7fj [Eclipse Theia] Arbitrary Command Execution via Untrusted Workspace Task Definitions
History
Type Values Removed Values Added
First Time appeared Eclipse
Eclipse theia
Vendors & Products Eclipse
Eclipse theia
Type Values Removed Values Added
Title Remote Code Execution via Untrusted Workspace Task Definitions
Type Values Removed Values Added
Description In Eclipse Theia versions prior to 1.69.0, custom task definitions in workspace files (e.g. .theia/tasks.json, .vscode/tasks.json) could be executed without requiring workspace trust. An attacker could craft a malicious repository that, when cloned and opened in Theia, leads to execution of arbitrary commands with the user's privileges. In combination with AI chat features and a workspace .theia/settings.json that disabled tool confirmation, this could be triggered automatically by sending a message in the AI chat.
Weaknesses CWE-829
References
Metrics cvssV4_0

{'score': 8.4, 'vector': 'CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N'}

ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
eclipse
Published
Updated
Jun 19, 2026, 3:55 AM
Reserved
May 22, 2026, 7:47 AM
Status
Analyzed
Published
Jun 18, 2026, 4:16 PM
Modified
Oct 26, 2026, 11:10 AM