Prototype Pollution

Overview @theia/core is a the main extension for all Theia-based applications, and provides the main framework for all dependent extensions. Affected versions of this package are vulnerable to Prototype Pollution via the PreferenceUtils.merge function in PreferenceUtils within preference...

CVE-2026-14574

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...

PT-2026-68093

Name of the Vulnerable Software and Affected Versions Eclipse Theia versions 0.7.0 through 1.73.1 Description The PreferenceUtils.merge function in @theia/core recursively merges preference values without rejecting prototype-related keys such as proto , constructor, and prototype. This function i...

CVE-2026-14574: Improperly Controlled Modification of Object Prototype Attributes

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...

Server-side Request Forgery (SSRF)

Overview @theia/core is a the main extension for all Theia-based applications, and provides the main framework for all dependent extensions. Affected versions of this package are vulnerable to Server-side Request Forgery SSRF via the request-service process. An attacker can access sensitive...

Missing Origin Validation in WebSockets

Overview @theia/core is a the main extension for all Theia-based applications, and provides the main framework for all dependent extensions. Affected versions of this package are vulnerable to Missing Origin Validation in WebSockets via the shell-terminal and terminals/:id WebSocket endpoints whe...