GHSA-2fcv-qww3-9v6h
Babylon's malformed vote extensions are not rejected
Summary
Adversarial validators can send large vote extensions by using non-existing protobuf tags. This will result in the rejection of the subsequent block proposal. Eventually, all block proposals will be rejected by all validators.
Impact
A small group of adversarial validators can cause a chain halt.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- Low
- User interaction
- None
What an attacker can affect
- Confidentiality
- None
- Integrity
- None
- Availability
- High
What each source reports
GitHub Advisories Score used
Babylon's malformed vote extensions are not rejected
Summary
Adversarial validators can send large vote extensions by using non-existing protobuf tags. This will result in the rejection of the subsequent block proposal. Eventually, all block proposals will be rejected by all validators.
Impact
A small group of adversarial validators can cause a chain halt.
- Record
GHSA-2fcv-qww3-9v6h- CVSS 4.0
- 7.0 High
CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:H - Weakness
- CWE-770
- Updated
- 2026-11-02
OSV
Babylon's malformed vote extensions are not rejected
Summary
Adversarial validators can send large vote extensions by using non-existing protobuf tags. This will result in the rejection of the subsequent block proposal. Eventually, all block proposals will be rejected by all validators.
Impact
A small group of adversarial validators can cause a chain halt.
- Record
GHSA-2fcv-qww3-9v6h- CVSS 4.0
- 7.0 High
CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:H - Weakness
- CWE-770
- Updated
- 2026-11-02
OSVGO-2025-4157No score
Babylon's malformed vote extensions are not rejected in github.com/babylonlabs-io/babylon
Babylon's malformed vote extensions are not rejected in github.com/babylonlabs-io/babylon
- Record
GO-2025-4157- Updated
- 2026-11-02
Affected packages
| Package | Affected | Fixed |
|---|---|---|
github.com/babylonlabs-io/babylon/v4Go | before 4.1.0 | 4.1.0 |
github.com/babylonlabs-io/babylonGo | All versions | None known |
github.com/babylonlabs-io/babylon/v2Go | All versions | None known |
github.com/babylonlabs-io/babylon/v3Go | All versions | None known |
History
| Recorded | Changed | Sources |
|---|---|---|
| first indexed | GitHub Advisories, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
GHSA-2fcv-qww3-9v6h is a high vulnerability (CVSS 7.0) in github.com/babylonlabs-io/babylon/v4, published November 24, 2025. No source lists public exploit code. Fixed in github.com/babylonlabs-io/babylon/v4 4.1.0.