Reported November 10, 2026, at 15:49 (UTC+8). Sigma Prime released Lighthouse v8.3.3 with a high-priority security patch. The vulnerability details were being withheld until operators had upgraded.
All Lighthouse beacon node users were urged to upgrade as soon as possible. The reported priorities differ by component:
- Beacon nodes: High priority for both staking and non-staking users.
- Validator clients: Low priority for staking users.
If upgrading from v8.2.x or earlier, consult the v8.3.0 release notes first. The v8.3.3 update also includes upgrades to libp2p, crypto-bigint and libz-sys.