Polygon discloses security flaws fixed by hard forks

• Polygon disclosed multiple security vulnerabilities affecting its proof-of-stake network.
• The flaws affected block processing, validation and consensus across its Bor and Heimdall clients.
• Polygon fixed the vulnerabilities through the Austin and Kyoto hard forks.

Polygon disclosed multiple security vulnerabilities affecting its proof-of-stake network, with the flaws already fixed through two hard forks.

The vulnerabilities affected block processing, validation and consensus across Polygon’s Bor and Heimdall clients.

The disclosed issues included denial-of-service risks, excessive resource use and problems with checkpoint processing.

Polygon fixed the vulnerabilities through the Austin and Kyoto hard forks, which are already implemented.

The source reported no public evidence that the vulnerabilities were exploited before the fixes were deployed.

Validators and node operators were advised to use the latest software versions containing the security patches.

The disclosure highlights ongoing security risks for proof-of-stake blockchain networks and the role of timely software updates.