CVE-2026-44691
Eclipse Theia Workspace Trust Bypass via Malicious Task Definitions
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.
INFO
Published Date :
June 18, 2026, 2:35 p.m.
Last Modified :
June 18, 2026, 2:35 p.m.
Remotely Exploit :
No
Source :
eclipse
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 4.0 | HIGH | e51fbebd-6053-4e49-959f-1b94eeb69a2c |
Solution
- Update Eclipse Theia to version 1.69.0 or later.
- Ensure workspace trust is configured and enforced.
- Review and restrict custom task definitions in workspaces.
- Disable AI chat features if trust is not guaranteed.
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CVE-2026-44691 vulnerability anywhere in the article.