Improper Handling of Syntactically Invalid Structure Affecting github.com/cometbft/cometbft/consensus package, versions <0.37.16>0.38.0-alpha.1 <0.38.19
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Test your applications- Snyk IDSNYK-GOLANG-GITHUBCOMCOMETBFTCOMETBFTCONSENSUS-13553936
- published15 Oct 2025
- disclosed14 Oct 2025
- creditwhoismxuse
Introduced: 14 Oct 2025
New CVE NOT AVAILABLE CWE-228 Â (opens in a new tab)How to fix?
Upgrade github.com/cometbft/cometbft/consensus to version 0.37.16, 0.38.19 or higher.
Overview
github.com/cometbft/cometbft/consensus is a Byzantine Fault Tolerant (BFT) middleware that takes a state transition machine - written in any programming language - and securely replicates it on many machines.
Affected versions of this package are vulnerable to Improper Handling of Syntactically Invalid Structure via the handling of BitArray objects with mismatched Elems and Bits values. An attacker can cause network disruption or halt by sending specially crafted messages containing invalid BitArray states to peers, which may then propagate these messages throughout the network before processing them themselves.
Workaround
This vulnerability can be mitigated by banning the IP address of malicious peers using tools such as iptables.