Polygon Labs announced it resolved a series of security vulnerabilities through two discreet hard forks—the Austin upgrade on its Bor client and the Kyoto upgrade on its Heimdall client—first validated on the Amoy testnet before being activated on mainnet.
The patches eliminated denial‑of‑service vectors in block processing and addressed a more severe flaw that could have forced the entire validator set into costly, coordinated work via a single malicious transaction.
Polygon’s native token POL traded near $0.09983 on Sunday, down 2.3% for the day and 6.8% over the past week.
Polygon Labs has disclosed that it quietly addressed a batch of security flaws in its proof‑of‑stake network by rolling out two hard forks before making the details public.
In a forum post released Wednesday, the team outlined the fixes bundled into the Austin fork for the Bor client and the Kyoto fork for the Heimdall client. Both upgrades followed the standard practice for consensus‑affecting changes: they were deployed privately, validated on the Amoy testnet, and then activated on the mainnet, with public disclosure occurring once the network was secure.
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The Austin fork closed two denial‑of‑service paths in block processing, including a scenario where a malicious block producer could crash peer nodes by including an oversized data field in a block.
The Kyoto fork addressed a broader set of consensus‑hardening issues, the most critical being a flaw that could have forced the entire validator set into costly, coordinated work using a single crafted transaction—cheap to construct but expensive for the network to process.
Polygon emphasized that none of the vulnerabilities were observed being exploited on mainnet and that all were remedied proactively. Both upgrades are now mandatory for node operators and are already live, requiring no state migration or resynchronization.
The disclosures come at a key juncture for Polygon, which recently completed the migration of its legacy MATIC token to the new POL token as part of a broader overhaul of its network architecture.
The announcement did little to boost POL’s price, which remained around $0.09983 on Sunday, reflecting a 2.3% drop over the past 24 hours, according to CoinGecko.
The token has slipped roughly 6.8% over the past week and is down about 60.8% year‑over‑year, leaving it with a market capitalization near $1.07 billion despite recent month‑over‑month gains.
