Polygon Fixes Security Flaws Through Hard Forks, Maintains Network Stability

Polygon has revealed several previously private security vulnerabilities in its proof-of-stake network that could have disrupted operations. The issues were addressed through two recent hard forks, Austin and Kyoto, which deployed fixes before being activated on mainnet.

The vulnerabilities affected Polygon's Bor and Heimdall clients, including denial-of-service risks and flaws affecting checkpoint and milestone processing.

The most severe issue involved Heimdall, where a specially crafted transaction could force validators to perform excessive processing work, potentially disrupting the network.