Eclipse Theia - Unauthenticated Path Traversal

Eclipse Theia's plugin-ext backend exposes the hostedPlugin endpoint without constraining the resolved path to the plugin directory. An unauthenticated request using encoded traversal sequences can therefore read files accessible to the backend process. The built-in vscodebat plugin identifier...

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

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...

PT-2026-68091

Name of the Vulnerable Software and Affected Versions Eclipse Theia versions 1.66.0 through 1.73.1 Description The @theia/plugin-ext backend exposes the /hostedPlugin/:pluginId/:path HTTP endpoint. The system resolves the requested file path using the path.resolvelocalPath, filePath function...