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NicNomadic merged 3 commits into from
Jul 21, 2026
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Nic fast 6.6 #434

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detail a bit the previous upgrade 6.5
NicNomadic Jul 20, 2026
c5e164a
introduce upgrade 6.6
NicNomadic Jul 20, 2026
53b71d7
add few details about 6.6
NicNomadic Jul 21, 2026
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8 changes: 8 additions & 0 deletions docs/progress/upgrades.md
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Expand Up @@ -160,9 +160,17 @@ For more information, see [Announcing Etherlink 6.4: a security and liveness har
## Etherlink 6.5

The Etherlink 6.5 upgrade went live on 27 June 2026 through the fast kernel governance process and addressed a critical vulnerability that has been reported through the Tezos Foundation’s security bug bounty platform.
This vulnerability could allow an attacker to claim several times a deposit made via the FA bridge, under certain circumstances.

For more information, see [Announcing Etherlink 6.5: a security bugfix for Farfadet](https://forum.tezosagora.org/t/announcing-etherlink-6-5-a-security-bugfix-for-farfadet/7120).

## Etherlink 6.6

The Etherlink 6.6 upgrade went live on 18 July 2026 through the fast kernel governance process and introduced a series of security and robustness improvements to the Etherlink kernel, further strengthening the network's reliability and resilience.
In particular, it contains three fixes hardening the sequencer upgrade (or change) and one fix of a liveness/DoS bug in the decoding of blueprints.

For more information, see [Announcing Etherlink 6.6: a security hardening kernel upgrade proposal](https://forum.tezosagora.org/t/announcing-etherlink-6-6-a-security-hardening-kernel-upgrade-proposal/7137).

## Changelog

For full details about changes to Etherlink, see [Changelogs](/progress/changelogs).
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