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High —
CometBFT has inconsistencies between how commit signatures are verified and how block time is derived
# CSA-2026-001: Tachyon ## Description **Name:** CSA-2026-001: Tachyon **Criticality:** Critical (Catastrophic Impact; Possible Likelihood per [ACMv1.2](https://github.com/interchainio/security/blob/main/resources/CLASSIFICATION_MATRIX.md)) **Affected version…
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High —
CometBFT's invalid BitArray handling can lead to network halt
Name: ASA-2025-003: Invalid BitArray handling can lead to network halt Criticality: High (Considerable Impact; Possible Likelihood per [ACMv1.2](https://github.com/interchainio/security/blob/main/resources/CLASSIFICATION_MATRIX.md)) Affected versions: `<= v0.…
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High 7.1
Malicious peer can make node stuck in blocksync in github.com/cometbft/cometbft
CometBFT is a distributed, Byzantine fault-tolerant, deterministic state machine replication engine. In the `blocksync` protocol peers send their `base` and `latest` heights when they connect to a new node (`A`), which is syncing to the tip of a network. `bas…
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High —
CometBFT allows a malicious peer to stall the network by disseminating seemingly valid block parts
Name: ASA-2025-002: Malicious peer can stall network by disseminating seemingly valid block parts Component: CometBFT Criticality: High (Catastrophic Impact; Possible Likelihood per [ACMv1.2](https://github.com/interchainio/security/blob/main/resources/CLASSI…
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High —
CometBFT Vote Extensions: Panic when receiving a Pre-commit with an invalid data
Name: ASA-2024-011: Vote Extensions: Panic when receiving a Pre-commit with an invalid data Component: CometBFT Criticality: High (Considerable Impact, and Possible Likelihood per [ACMv1.2](https://github.com/interchainio/security/blob/main/resources/CLASSIFI…
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High —
Validation of `VoteExtensionsEnableHeight` can cause chain halt in Go package github.com/cometbft/cometbft
## Summary A vulnerability in CometBFT’s validation logic for `VoteExtensionsEnableHeight` can result in a chain halt when triggered through a governance parameter change proposal on an ABCI2 Application Chain. If a parameter change proposal including a `Vote…
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High 8.2
CometBFT may duplicate transactions in the mempool's data structures
CometBFT is a Byzantine Fault Tolerant (BFT) middleware that takes a state transition machine and replicates it on many machines. The mempool maintains two data structures to keep track of outstanding transactions: a list and a map. These two data structures …