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. An attacker could craft a malicious repository containing prompt template files that, when the workspace was opened in Theia, replaced the AI's system instructions with attacker-controlled content (indirect prompt injection). Combined with other AI chat features available in untrusted workspaces, this enabled attack chains leading to data exfiltration via Markdown image rendering or arbitrary command execution via task definitions.
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Thu, 18 Jun 2026 17:30:00 +0000
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ssvc
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Thu, 18 Jun 2026 16:45:00 +0000
| Type | Values Removed | Values Added |
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| 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. An attacker could craft a malicious repository containing prompt template files that, when the workspace was opened in Theia, replaced the AI's system instructions with attacker-controlled content (indirect prompt injection). Combined with other AI chat features available in untrusted workspaces, this enabled attack chains leading to data exfiltration via Markdown image rendering or arbitrary command execution via task definitions. | |
| Weaknesses | CWE-1427 CWE-829 |
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| References |
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| Metrics |
cvssV4_0
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Status: PUBLISHED
Assigner: eclipse
Published:
Updated: 2026-06-18T15:26:46.566Z
Reserved: 2026-05-22T07:47:58.202Z
Link: CVE-2026-46580
Updated: 2026-06-18T15:26:41.287Z
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