CVE-2026-60009

In Eclipse Theia up to 1.73.1, the backend @theia/filesystem binds POST /file-upload in every filesystem-enabled deployment. The handler uses an attacker-supplied absolute path from the multipart uri field and calls fs.move(tmp, target, { overwrite: true }) with no workspace confinement and no au...

CVE-2026-12609

CVE-2026-12609 affects Eclipse Theia (versions 1.66.0 to 1.73.1) where the backend of the @theia/plugin-ext module exposes the /hostedPlugin/:pluginId/:path(*) endpoint. The endpoint resolves the requested path with path.resolve(localPath, filePath) without ensuring the result stays within the pl...

EUVD-2026-53302

In Eclipse Theia versions 0.7.0 and up until including 1.73.1, the PreferenceUtils.merge function in @theia/core recursively merges preference values without rejecting prototype-related keys proto, constructor, prototype. Because this function is invoked by PreferenceServiceImpl.doResolve for eve...

CVE-2021-34435

In Eclipse Theia 0.3.9 to 1.8.1, the "mini-browser" extension allows a user to preview HTML files in an iframe inside the IDE. But with the way it is made it is possible for a previewed HTML file to trigger an RCE. This exploit only happens if a user previews a malicious file...

Eclipse Theia Data Forgery Issue Vulnerability

Eclipse Theia is the Eclipse Foundation's set of Visual Studio Code-based open source integrated development environment for desktop and Web applications framework. A data forgery vulnerability exists in Eclipse Theia versions 0.3.9 through 0.15.0. A remote attacker can exploit this vulnerability...