Matrix clients -- Prototype pollution in matrix-js-sdk

Matrix developers report:

Today we are issuing security releases of matrix-js-sdk and matrix-react-sdk
to patch a pair of High severity vulnerabilities (CVE-2023-28427 /
GHSA-mwq8-fjpf-c2gr for matrix-js-sdk and CVE-2023-28103 / GHSA-6g43-88cp-w5gv
for matrix-react-sdk).
The issues involve prototype pollution via events containing special strings
in key locations, which can temporarily disrupt normal functioning of matrix-js-sdk
and matrix-react-sdk, potentially impacting the consumer’s ability to process data
safely.