Polygon Fixes Security Issues in PoS Network Through Recent Hard Forks

Polygon Labs has revealed details of multiple security vulnerabilities that could have threatened its Proof-of-Stake (PoS) network. The company fixed the issues via two recent hard forks, Austin for Bor and Kyoto for Heimdall.

The flaws impacted both clients' reliability and ranged from denial-of-service (DoS) vectors to bugs that interfered with validator and checkpoint-related processing. Polygon said it has seen no evidence of the vulnerabilities being exploited on mainnet.

After the hard fork activation heights, nodes running older client versions will fall out of consensus and must upgrade to rejoin the canonical chain. Upgrades are already live on mainnet for Bor v2.10.0 for PoS nodes and Heimdall v0.11.0 for validators and full nodes.

The security issues were addressed through two hard forks, with testing before activation on mainnet. Polygon said that none of the disclosed vulnerabilities had been observed being exploited on mainnet.