Arbitrary Command Execution Vulnerability in Eclipse Theia
CVE-2026-44691

8.4HIGH

Key Information:

Vendor

Eclipse Foundation

Status
Eclipse Theia
Vendor
CVE Published:
18 June 2026

What is CVE-2026-44691?

In Eclipse Theia versions prior to 1.69.0, a vulnerability allows arbitrary command execution through custom task definitions in workspace files. Malicious actors can exploit this by creating harmful repositories that trigger execution of commands using the user's privileges, particularly when combined with AI chat features. This vulnerability can be further exacerbated by a workspace configuration that disables tool confirmations, potentially leading to automatic execution of commands when the malicious message is sent.

Affected Version(s)

Eclipse Theia 0 < 1.69.0

References

https://gitlab.eclipse.org/security/cve-assignment/-/work...

CVSS V4

Score:
8.4
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Local
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
Unknown

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Piotr Ryciak (https://gitlab.eclipse.org/void01)
.