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      Polygon Addresses Security Vulnerabilities in Recent Hard Forks

      Polygon Labs has announced the resolution of two security vulnerabilities that were addressed in the Austin and Kyoto hard forks, which were implemented on the Polygon proof-of-stake mainnet on August 29. The vulnerabilities involved denial-of-service and resource-exhaustion issues that could potentially disrupt network operations. The technical details of these vulnerabilities were shared in a community forum post two days after the successful activation of the upgrades.

      The Austin hard fork upgraded the Bor execution client to version 2.10.0, while the Kyoto upgrade improved the Heimdall consensus client to version 0.11.0. The Bor upgrade introduced limits on L1-to-L2 state-sync events to prevent resource overconsumption and addressed issues with unbounded transaction dependency data that could stall block processing. Meanwhile, the Heimdall upgrade fixed vulnerabilities related to byte-level nesting in protobuf Any messages, which could disrupt consensus messaging among validators.

      Validators and node operators who have not upgraded to the latest versions are now operating outside of the network's canonical consensus, effectively forking onto an abandoned chain. Polygon has urged these operators to upgrade immediately or follow rollback and resynchronization procedures to avoid further complications. No disruptions to the mainnet were reported during the activation of either fork, which had been validated on the Amoy testnet prior to deployment.

      © 2026 KLEA News. All Rights Reserved. This article is provided for informational purposes only. It is not offered or intended to be used as legal, tax, investment, financial, or other advice.

      Source: KLEA News

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