[Urgent] op-geth upgrade to v1.101609.0

Scheduled Maintenance Report for Quicknode

Completed

The scheduled maintenance has been completed.

Posted Feb 20, 2026 - 14:45 UTC

In progress

Scheduled maintenance is currently in progress. We will provide updates as necessary.

Posted Feb 19, 2026 - 14:45 UTC

Scheduled

Scheduled maintenance will be performed during the scheduled maintenance window to apply urgent node software updates across all Optimism based chains and networks.

**Client Updates:**
- op-geth: Upgrading to v1.101609.0

**Release Notes Summary:**

Security fixes backported from go-ethereum v1.16.9:

- Cryptographic vulnerability fixes in secp256k1 coordinate validation and ECIES invalid-curve handling — these affect low-level signature and encryption operations underlying transaction signing and processing.

**Full Release Notes:**
- https://github.com/ethereum-optimism/op-geth/releases/tag/v1.101609.0

Posted Feb 19, 2026 - 14:36 UTC

This scheduled maintenance affected: Optimism (Mainnet — JSON-RPC API, Sepolia - JSON RPC), Base (Mainnet — JSON-RPC API, Sepolia - JSON-RPC API), Cyber (Mainnet - JSON-RPC API, Sepolia — JSON-RPC API), Mode (Select Access) (Mainnet — JSON-RPC API), Zora (Select Access) (Mainnet — JSON-RPC API), Fraxtal (Select Access) (Mainnet — JSON-RPC API), Ink (Beta) (Mainnet — JSON-RPC API, Sepolia — JSON-RPC API), World Chain (Mainnet — JSON-RPC API, Sepolia — JSON-RPC API), Lisk (Select Access) (Mainnet — JSON-RPC API), Unichain (Beta) (Mainnet — JSON-RPC API, Sepolia — JSON-RPC API), and Soneium (Beta) (Mainnet — JSON-RPC API).