[Eclipse Theia] Indirect Prompt Injection via Auto-Loaded Workspace Prompt Template Files in AI Chat - @theia/ai-code-completion

Description

In Eclipse Theia versions prior to 1.71.0, files matching the pattern .prompts/*.prompttemplate in a workspace were automatically loaded and could override or extend the AI agent’s system prompts.

Recommendation

Update the @theia/ai-code-completion package to the latest compatible version. Followings are version details:

• Affected version(s): < 1.71.0
• Patched version(s): 1.71.0

References

• GHSA-m973-pr9r-hp2w
• gitlab.eclipse.org
• CVE-2026-46580
• CWE-829
• CAPEC-310
• OWASP 2021-A6
• OWASP 2021-A8