Outage in QuickNode

Urgent: Ethereum Mainnet & Sepolia & Hoodi – Mandatory Geth Security Upgrade

Resolved Minor

January 14, 2026 - Started 3 months ago - Lasted about 22 hours
Official incident page

Incident Report

We are performing a mandatory security upgrade across all Ethereum networks. The update addresses a security issue on the peering networking on the Geth client. No downtime is expected, but customers may experience brief connection interruptions and a small number of HTTP 503 responses as services restart and resynchronize with the network. Geth: Moisture Filters (v1.16.8) https://github.com/ethereum/go-ethereum/releases/tag/v1.16.8

Components affected

QuickNode Mainnet JSON-RPC Request API QuickNode Mainnet Websockets API QuickNode Sepolia JSON-RPC API QuickNode Sepolia Websockets API

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Latest Updates ( sorted recent to last )

RESOLVED 3 months ago - at 01/15/2026 10:19AM

This incident has been resolved.

IDENTIFIED 3 months ago - at 01/14/2026 02:08PM

We are continuing to work on a fix for this issue.

IDENTIFIED 3 months ago - at 01/14/2026 01:30PM

We are continuing to work on a fix for this issue.

IDENTIFIED 3 months ago - at 01/14/2026 12:38PM

We are performing a mandatory security upgrade across all Ethereum networks.
The update addresses a security issue on the peering networking on the Geth client.

No downtime is expected, but customers may experience brief connection interruptions and a small number of HTTP 503 responses as services restart and resynchronize with the network.

Geth: Moisture Filters (v1.16.8)
https://github.com/ethereum/go-ethereum/releases/tag/v1.16.8

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