According to ChainCatcher, Cosmos Hub said on X platform at 4:32 am today that Cosmos Hub is experiencing a temporary chain outage. Later, it said in a subsequent post that during the v17 upgrade, Hub validators patched a security vulnerability in the Liquid Staking Module (LSM).

After most validators implemented the patch to fix the vulnerability, Cosmos Hub said a few minutes ago that the previous problem has been fixed and Cosmos Hub is generating blocks again. Informal Systems and Hypha Cosmos will release a post-mortem analysis with all the details as soon as possible.