0xPolygon/bor - Bor v2.9.0 - Valencia hardfork New

Published: Jul 2, 2026

Release Summary

A new version of the Polygon PoS Bor execution client, v2.9.0, has been released. This is a mandatory update that enables the Valencia hardfork.

This public release incorporates changes from a previous private security release (`v2.9.0-priv`). All node operators must upgrade to this version to remain in sync with the network following the hardfork activation.

The Valencia hardfork will be activated at the following block heights:
Amoy: Block 40,776,000
Mainnet: Block 89,531,000

Release Notes

Valencia hardfork release for the Polygon PoS Bor execution client.

## Activation

| Network | Block |
| --- | --- |
| Amoy | 40,776,000 |
| Mainnet | 89,531,000 |

## What's Changed
* Release v2.9.0 by @kamuikatsurgi in https://github.com/0xPolygon/bor/pull/2295


**Full Changelog**: https://github.com/0xPolygon/bor/compare/v2.8.3...v2.9.0

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