Vulnerability · Published Jun 18, 2026 · Assigned by eclipse
CVE-2026-44691
High 8.4
In plain English
A high-severity security flaw in Eclipse Theia from Eclipse Foundation. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 35% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official 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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| npm | @theia/debug | 1.69.0 | GHSA-g9jw-92q7-g7fj |
| npm | @theia/task | 1.69.0 | GHSA-g9jw-92q7-g7fj |
| npm | @theia/workspace | 1.69.0 | GHSA-g9jw-92q7-g7fj |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Eclipse Foundation | Eclipse Theia | 0 – before 1.69.0 |
Weakness: CWE-829 · 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