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Home/News Feed/Polygon fixes key security flaws in Austin and Kyoto hard forks without mainnet issues
MATIC
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Polygon fixes key security flaws in Austin and Kyoto hard forks without mainnet issues

Protocol Fundamentals
29 Aug 2026
Crypto Briefing
View Source
Neutral
pluang ai news

Polygon Labs patched two security vulnerabilities through the Austin and Kyoto hard forks activated on August 29, 2026. These upgrades addressed denial-of-service and resource exhaustion risks in the Bor execution client and Heimdall consensus client, preventing potential network disruptions. Validators must upgrade to the new versions immediately to stay on the canonical chain, as nodes running old software are now out of sync. No mainnet disruptions were reported during the upgrades, which followed thorough testing on the Amoy testnet.

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