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CVE-2026-82217

In Eclipse Theia versions 1.73.0 up to but not including 1.75.0, the AI "Agent Mode" file-change tools (writeFileContent, suggestFileContent

Published
Last modified
published
Not listed in CISA KEV
Fix
Fixed in 1.75.0
None on Exploit-DB, Metasploit or GitHub
  • Exploitation: poc
  • Automatable: no
  • Technical impact: total

Summary

In Eclipse Theia versions 1.73.0 up to but not including 1.75.0, the AI "Agent Mode" file-change tools (writeFileContent, suggestFileContent, and the replacement and state helpers) resolved a model-supplied file path without a workspace-containment check. A crafted relative path such as ../.bashrc, an absolute path, or a ~-expanded path could therefore write or delete files outside the workspace with the privileges of the Theia backend OS user. Because the path argument is influenced by model output, it can be steered through indirect prompt injection, and in Agent Mode writes are applied without a confirmation dialog. Writing to a host-executed file such as a shell startup file or ~/.ssh/authorized_keys can escalate to code execution on the backend.

Timeline

  1. CISA SSVC assessment

    Exploitation: poc · Automatable: no · Technical impact: total

  2. CVE published
  3. Record last updated

Affected versions

  • Eclipse Foundation Eclipse Theia

    From 1.73.0 · fixed in 1.75.0

References 2

gitlab.eclipse.org

GitHub · eclipse-theia/theia