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Release of Canton 3.5.11

Canton 3.5.11 has been released on July 30, 2026.

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Summary

This is a maintenance release that fixes a bug in participants for LSU and provides minor operational improvements.

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What’s New

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Minor Improvements

• Improved the resilience of the CachedJwtVerifierLoader JWK cache during temporary JWKS endpoint outages. Set the jwks-cache-config.auto-refresh-after configuration to a positive duration below jwks-cache-config.cache-expiration on any participant, sequencer, and mediator node admin-api, participant node ledger-api, and sequencer node public-api to reduce the chances of cache misses and corresponding auth outages.
• Bumped the version of AWS SDK from 2.44.3 to 2.49.3 to fix a security vulnerability with netty.
• Added index that improves performance of block sequencer pruning.

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Bugfixes

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Participant node restart failure after a canceled LSU followed by a successful LSU

A Participant node would not start up with a failure log "Attempting to run Startup participant node failed with Unable to finish upgrade ..." following a restart. This can happen after a successful LSU following an earlier canceled LSU. The bugfix allows a participant node to start up successfully in this scenario.

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Compatibility

The following Canton protocol versions are supported: Canton has been tested against the following versions of its dependencies: