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0xCERT Security Advisory 0xCERT-2025-0001
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Advisory-ID:  0xCERT-2025-0001
Severity:     High
Published:    2025-10-14T19:57:30.000Z
Updated:      2026-10-08T22:48:24.098Z
Chains:       Cosmos Hub
URL:          https://www.0xcert.com/advisory/0xCERT-2025-0001

Title: CometBFT's invalid BitArray handling can lead to network halt

Summary
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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) Affected versions: <= v0.

Details
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Summary
Name: ASA-2025-003: Invalid BitArray handling can lead to network halt Criticality: High (Considerable Impact; Possible Likelihood per ACMv1.2) Affected versions: <= v0.

Affected
- - github.com/cometbft/cometbft (go) <= 0.37.15 — fixed in 0.37.16
- - github.com/cometbft/cometbft (go) >= 0.38.0-alpha.1, <= 0.38.18 — fixed in 0.38.19

Severity
High (CVSS 8.7), as rated by the upstream advisory.

Recommended actions
- - Upgrade github.com/cometbft/cometbft to 0.37.16 or later
- - Upgrade github.com/cometbft/cometbft to 0.38.19 or later

Source & attribution
This 0xCERT advisory summarises GHSA-hrhf-2vcr-ghch from the GitHub Advisory Database, credited upstream to whoismxuse: https://github.com/advisories/GHSA-hrhf-2vcr-ghch. Details may change; refer to the original source for the authoritative record.

References
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- - https://github.com/advisories/GHSA-hrhf-2vcr-ghch
- - https://github.com/cometbft/cometbft/security/advisories/GHSA-hrhf-2vcr-ghch
- - https://github.com/cometbft/cometbft/commit/be5677c3e58f998b7f67bb6186dd2c9b81a041a1
- - https://github.com/cometbft/cometbft/commit/dcb1f265b59477be40804f7ccdc4fb30612d6a4f
- - https://github.com/cometbft/cometbft/releases/tag/v0.37.16
- - https://github.com/cometbft/cometbft/releases/tag/v0.38.19

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