GHSA-m973-pr9r-hp2w
[Eclipse Theia] Indirect Prompt Injection via Auto-Loaded Workspace Prompt Template Files in AI Chat
Quick fix
GHSA-m973-pr9r-hp2w — @theia/ai-chat-ui: upgrade to the fixed version with the command below.
npm install @theia/ai-chat-ui@1.71.0Details
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.
Are you affected?
Enter the version of the package you're using.
Affected packages
0Fixed in: 1.71.0npm install @theia/ai-claude-code@1.71.00Fixed in: 1.71.0npm install @theia/ai-code-completion@1.71.0References
- https://nvd.nist.gov/vuln/detail/CVE-2026-46580[ADVISORY]
- https://github.com/eclipse-theia/theia/issues/16892[WEB]
- https://github.com/eclipse-theia/theia/pull/17364[WEB]
- https://github.com/eclipse-theia/theia/commit/e3fdfe6992389bc5fa611058d00c39d7408508ed[WEB]
- https://github.com/eclipse-theia/theia[PACKAGE]
- https://gitlab.eclipse.org/security/cve-assignment/-/work_items/114[WEB]