CVE-2026-12609

In Eclipse Theia versions 1.66.0 and up until including 1.73.1, the @theia/plugin-ext backend exposes the /hostedPlugin/:pluginId/:path HTTP endpoint, which resolves the requested file path with path.resolvelocalPath, filePath without verifying that the resolved path stays within the plugin's...

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...