GHSA-72qq-p3r5-f7wq (CVSS 9.3). web_core <= 0.10.1 passed an agent-supplied
`openUrl` argument straight to `window.open()` with no scheme allowlist, so a
Button whose `functionCall` named a `javascript:` URI executed arbitrary script
in the host origin when a user clicked it. The Basic Catalog is the default, so
no non-default configuration was required to be exposed.
We pinned 0.9.0 exactly, as a runtime dependency of two published packages
(@copilotkit/a2ui-renderer, @copilotkit/vue) and transitively of
@copilotkit/react-core and @copilotkit/angular, so downstream users could not
upgrade out of it on their own. 0.10.4 keeps the ./v0_9 and
./v0_9/basic_catalog entrypoints we import; the only symbol dropped from v0_9
is FrameworkSignal, which we never referenced.
Add regression tests over both renderers that reach the sink independently
(React and Lit). They assert that javascript: and data: URIs never reach
window.open, that https URLs still open with noopener,noreferrer, and that a
blocked scheme leaves the surface mounted rather than escaping into the click
handler. Verified they fail against 0.9.0 and pass against 0.10.4.
Mark
36f2972150