The dev team was informed of a security issue affecting Polkadot-sdk. More information will come after the fix. This runtime upgrade aims to fix the issue, changes can be found on the release. Please note the upgrade is submitted on Whitelisted Caller track, meaning the Fellowship is voting on a parallel submission to whitelist this proposal hash.

Please review and vote at your convenience!

Update: as posted by RTTI-5220 below, a post-mortem on the issue and the fix can be found here.